{"id":2932,"date":"2019-05-01T19:26:39","date_gmt":"2019-05-01T19:26:39","guid":{"rendered":"https:\/\/pageloot.com\/?p=2932"},"modified":"2026-10-21T07:36:15","modified_gmt":"2026-10-21T07:36:15","slug":"why-qr-code-not-working","status":"publish","type":"post","link":"https:\/\/pageloot.com\/vi\/qr-code-marketing\/why-qr-code-not-working\/","title":{"rendered":"T\u1ea1i sao m\u00e3 QR kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng? C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i qu\u00e9t th\u01b0\u1eddng g\u1eb7p"},"content":{"rendered":"<p class=\"wp-block-paragraph\">M\u00e3 QR kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c g\u1ea7n nh\u01b0 lu\u00f4n do m\u1ed9t trong s\u00e1u nguy\u00ean nh\u00e2n: m\u00e3 qu\u00e1 nh\u1ecf, \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n qu\u00e1 th\u1ea5p, l\u1ec1 xung quanh qu\u00e1 h\u1eb9p, li\u00ean k\u1ebft b\u00ean trong b\u1ecb h\u1ecfng ho\u1eb7c qu\u00e1 d\u00e0i, b\u1ea3n in b\u1ecb m\u1edd ho\u1eb7c b\u00f3ng, ho\u1eb7c \u0111i\u1ec7n tho\u1ea1i kh\u00f4ng th\u1ec3 l\u1ea5y n\u00e9t. H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p c\u00e1c ki\u1ec3m tra nhanh tr\u01b0\u1edbc, sau \u0111\u00f3 l\u00e0 chi ti\u1ebft v\u00e0 c\u00e1c con s\u1ed1 \u0111\u1ec3 kh\u1eafc ph\u1ee5c t\u1eebng nguy\u00ean nh\u00e2n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Danh s\u00e1ch ki\u1ec3m tra nhanh: Kh\u1eafc ph\u1ee5c m\u00e3 QR kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c<\/h2>\n\n\n\n<ol class=\"wp-block-list\"><li>T\u1ef1 m\u1edf li\u00ean k\u1ebft. N\u1ebfu trang kh\u00f4ng t\u1ea3i \u0111\u01b0\u1ee3c, m\u00e3 v\u1eabn t\u1ed1t nh\u01b0ng \u0111\u00edch \u0111\u1ebfn b\u1ecb h\u1ecfng. Kh\u1eafc ph\u1ee5c URL, ho\u1eb7c thay \u0111\u1ed5i n\u1ebfu m\u00e3 l\u00e0 \u0111\u1ed9ng.<\/li><li>Ki\u1ec3m tra k\u00edch th\u01b0\u1edbc. S\u1eed d\u1ee5ng chi\u1ec1u r\u1ed9ng \u00edt nh\u1ea5t 2 cm (0.8 inch) cho m\u00e3 c\u1ea7m tay v\u00e0 r\u1ed9ng 1 foot cho m\u1ed7i 10 foot kho\u1ea3ng c\u00e1ch qu\u00e9t.<\/li><li>Ki\u1ec3m tra \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n. S\u1eed d\u1ee5ng c\u00e1c m\u00f4-\u0111un t\u1ed1i tr\u00ean n\u1ec1n s\u00e1ng, l\u00fd t\u01b0\u1edfng l\u00e0 4.5:1 ho\u1eb7c cao h\u01a1n. Kh\u00f4ng \u0111\u1ea3o ng\u01b0\u1ee3c m\u00e0u s\u1eafc.<\/li><li>Ki\u1ec3m tra l\u1ec1. \u0110\u1ec3 l\u1ea1i m\u1ed9t \u0111\u01b0\u1eddng vi\u1ec1n tr\u1ed1ng \u00edt nh\u1ea5t 4 m\u00f4-\u0111un \u1edf c\u1ea3 b\u1ed1n ph\u00eda.<\/li><li>Ki\u1ec3m tra b\u1ea3n in. S\u1eed d\u1ee5ng SVG ho\u1eb7c PDF, b\u1ec1 m\u1eb7t m\u1edd v\u00e0 \u0111\u1eb7t ph\u1eb3ng.<\/li><li>Qu\u00e9t b\u1eb1ng hai \u0111i\u1ec7n tho\u1ea1i kh\u00e1c nhau trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng n\u01a1i m\u00e3 s\u1ebd th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i sao K\u00edch th\u01b0\u1edbc v\u00e0 Kho\u1ea3ng c\u00e1ch Quy\u1ebft \u0111\u1ecbnh Kh\u1ea3 n\u0103ng Qu\u00e9t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">K\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u1ee7a m\u00e3 QR l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y ra s\u1ef1 c\u1ed1 qu\u00e9t. N\u1ebfu m\u00e3 qu\u00e1 nh\u1ecf, camera \u0111i\u1ec7n tho\u1ea1i kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c m\u00f4-\u0111un ri\u00eang l\u1ebb. S\u1eed d\u1ee5ng t\u1ed1i thi\u1ec3u 0.8 x 0.8 inch (2 x 2 cm) cho c\u00e1c v\u1eadt ph\u1ea9m t\u1ea7m g\u1ea7n nh\u01b0 danh thi\u1ebfp v\u00e0 bao b\u00ec s\u1ea3n ph\u1ea9m. \u0110\u1ed1i v\u1edbi m\u00e3 \u0111\u01b0\u1ee3c qu\u00e9t t\u1eeb xa, h\u00e3y s\u1eed d\u1ee5ng quy t\u1eafc 10:1: m\u00e3 nh\u00ecn t\u1eeb kho\u1ea3ng c\u00e1ch 10 feet ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t 1 foot. M\u1ed9t poster \u0111\u1ecdc t\u1eeb 3 m\u00e9t c\u1ea7n m\u1ed9t m\u00e3 kho\u1ea3ng 30 cm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1eef li\u1ec7u d\u00e0y \u0111\u1eb7c h\u01a1n c\u1ea7n nhi\u1ec1u m\u00f4-\u0111un h\u01a1n, v\u00e0 nhi\u1ec1u m\u00f4-\u0111un h\u01a1n c\u1ea7n k\u00edch th\u01b0\u1edbc in l\u1edbn h\u01a1n. Theo d\u00f5i <a href=\"https:\/\/pageloot.com\/vi\/blog\/best-practices-for-qr-code-readability\/\">c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t \u0111\u1ec3 \u0111\u1ecdc m\u00e3 QR<\/a> gi\u00fap b\u1ea1n \u0111\u1eb7t t\u1ef7 l\u1ec7 tr\u01b0\u1edbc khi in s\u1ed1 l\u01b0\u1ee3ng l\u1edbn. N\u1ebfu b\u1ea1n kh\u00f4ng ch\u1eafc ch\u1eafn v\u1ec1 v\u1ecb tr\u00ed cu\u1ed1i c\u00f9ng, h\u00e3y ch\u1ecdn k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n. C\u00e1c \u0111i\u1ec7n tho\u1ea1i c\u0169 h\u01a1n v\u1edbi camera \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p c\u1ea7n \u0111i\u1ec1u n\u00e0y nh\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i sao \u0110\u1ed9 T\u01b0\u01a1ng ph\u1ea3n M\u00e0u s\u1eafc l\u00e0 N\u1ec1n t\u1ea3ng c\u1ee7a Kh\u1ea3 n\u0103ng \u0110\u1ecdc<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e1y qu\u00e9t gi\u1ea3i m\u00e3 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c m\u00f4-\u0111un t\u1ed1i v\u00e0 s\u00e1ng. N\u1ebfu \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n qu\u00e1 th\u1ea5p, ph\u1ea7n m\u1ec1m kh\u00f4ng th\u1ec3 t\u00ecm th\u1ea5y m\u1eabu so v\u1edbi n\u1ec1n. Gi\u1eef t\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n 4.5:1 ho\u1eb7c cao h\u01a1n, nh\u01b0 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 trong <a href=\"https:\/\/pageloot.com\/vi\/blog\/qr-code-color-contrast-best-practices\/\">c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e0u s\u1eafc<\/a>. M\u00e0u \u0111en tr\u00ean n\u1ec1n tr\u1eafng l\u00e0 \u0111\u00e1ng tin c\u1eady nh\u1ea5t. Xanh navy \u0111\u1eadm, t\u00edm \u0111\u1eadm ho\u1eb7c xanh l\u00e1 c\u00e2y r\u1eebng tr\u00ean n\u1ec1n x\u00e1m nh\u1ea1t ho\u1eb7c kem c\u0169ng hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00e1nh c\u00e1c m\u00e3 \u0111\u1ea3o ng\u01b0\u1ee3c (m\u00f4-\u0111un m\u00e0u s\u00e1ng tr\u00ean n\u1ec1n t\u1ed1i), v\u00ec nhi\u1ec1u \u1ee9ng d\u1ee5ng m\u00e1y \u1ea3nh kh\u00f4ng th\u1ec3 \u0111\u1ecdc ch\u00fang. Tr\u00e1nh c\u00e1c gradient v\u00e0 n\u1ec1n trong m\u1edd, v\u00ec ch\u00fang t\u1ea1o ra c\u00e1c t\u00f4ng m\u00e0u trung gian kh\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ef1c hay gi\u1ea5y \u0111\u1ed1i v\u1edbi m\u00e1y qu\u00e9t. M\u00e0u \u0111\u1ecf tr\u00ean n\u1ec1n tr\u1eafng l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn, v\u00ec m\u1ed9t s\u1ed1 m\u00e1y qu\u00e9t \u0111\u1ecdc m\u00e0u \u0111\u1ecf nh\u01b0 m\u1ed9t m\u00e0u s\u00e1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea7m quan tr\u1ecdng c\u1ee7a V\u00f9ng y\u00ean t\u0129nh v\u00e0 Kho\u1ea3ng \u0111\u1ec7m<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00f9ng y\u00ean t\u0129nh l\u00e0 l\u1ec1 tr\u1ed1ng xung quanh b\u1ed1n ph\u00eda c\u1ee7a m\u00e3 QR. N\u00f3 cho m\u00e1y qu\u00e9t bi\u1ebft m\u00e3 b\u1eaft \u0111\u1ea7u \u1edf \u0111\u00e2u v\u00e0 thi\u1ebft k\u1ebf xung quanh k\u1ebft th\u00fac \u1edf \u0111\u00e2u. Ti\u00eau chu\u1ea9n y\u00eau c\u1ea7u \u00edt nh\u1ea5t 4 m\u00f4-\u0111un l\u1ec1. N\u1ebfu v\u0103n b\u1ea3n, logo ho\u1eb7c h\u1ecda ti\u1ebft n\u1ec1n ch\u1ea1m v\u00e0o kh\u00f4ng gian n\u00e0y, m\u00e1y qu\u00e9t c\u00f3 th\u1ec3 coi c\u00e1c y\u1ebfu t\u1ed1 \u0111\u00f3 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a m\u00e3 v\u00e0 qu\u00e1 tr\u00ecnh qu\u00e9t s\u1ebd th\u1ea5t b\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1eef cho \u0111\u01b0\u1eddng vi\u1ec1n n\u00e0y r\u00f5 r\u00e0ng l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t <a href=\"https:\/\/pageloot.com\/vi\/blog\/5-tips-for-faster-qr-code-scanning\/\">m\u1eb9o \u0111\u1ec3 qu\u00e9t nhanh h\u01a1n<\/a>. \u0110\u1eb7t m\u00e3 tr\u00ean m\u1ed9t h\u1ed9p tr\u1eafng ho\u1eb7c m\u1ed9t nh\u00e3n tr\u1eafng l\u00e0 c\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 gi\u1eef l\u1ec1 khi n\u1ec1n l\u00e0 m\u1ed9t b\u1ee9c \u1ea3nh ho\u1eb7c m\u1ed9t h\u1ecda ti\u1ebft.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu\u1ea3n l\u00fd \u0110\u1ed9 ph\u1ee9c t\u1ea1p D\u1eef li\u1ec7u b\u1eb1ng M\u00e3 QR \u0110\u1ed9ng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t m\u00e3 ch\u1ee9a URL d\u00e0i v\u1edbi nhi\u1ec1u th\u00f4ng s\u1ed1 theo d\u00f5i tr\u00f4ng d\u00e0y \u0111\u1eb7c v\u00e0 b\u1ecb pixel h\u00f3a. C\u00e1c kh\u1ed1i nh\u1ecf r\u1ea5t kh\u00f3 \u0111\u1ec3 m\u00e1y \u1ea3nh l\u1ea5y n\u00e9t. M\u1ed9t <a href=\"https:\/\/pageloot.com\/vi\/qr-code-generator\/\">tr\u00ecnh t\u1ea1o m\u00e3 QR<\/a> t\u1ea1o m\u00e3 \u0111\u1ed9ng gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y, v\u00ec m\u00e3 l\u01b0u tr\u1eef m\u1ed9t li\u00ean k\u1ebft chuy\u1ec3n h\u01b0\u1edbng ng\u1eafn thay v\u00ec \u0111\u1ecba ch\u1ec9 \u0111\u1ea7y \u0111\u1ee7. M\u1eabu m\u00e3 \u0111\u01a1n gi\u1ea3n h\u01a1n v\u00e0 qu\u00e9t nhanh h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e3 t\u0129nh l\u01b0u tr\u1eef \u0111\u00edch \u0111\u1ebfn tr\u1ef1c ti\u1ebfp trong m\u1eabu. Ch\u00fang kh\u00f4ng bao gi\u1edd h\u1ebft h\u1ea1n v\u00e0 l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1eafn khi li\u00ean k\u1ebft s\u1ebd kh\u00f4ng thay \u0111\u1ed5i, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ed9t trang web c\u1ed1 \u0111\u1ecbnh ho\u1eb7c th\u00f4ng tin \u0111\u0103ng nh\u1eadp Wi-Fi. \u0110i\u1ec3m y\u1ebfu l\u00e0 m\u00e3 \u0111\u00e3 in kh\u00f4ng th\u1ec3 ch\u1ec9nh s\u1eeda. N\u1ebfu trang b\u1ecb x\u00f3a ho\u1eb7c di chuy\u1ec3n, m\u1ecdi b\u1ea3n in s\u1ebd tr\u1ecf \u0111\u1ebfn m\u1ed9t li\u00ean k\u1ebft ch\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e3 \u0111\u1ed9ng cho ph\u00e9p b\u1ea1n thay \u0111\u1ed5i \u0111\u00edch \u0111\u1ebfn sau khi in, v\u00ec v\u1eady m\u1ed9t li\u00ean k\u1ebft b\u1ecb h\u1ecfng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eeda trong v\u00e0i ph\u00fat m\u00e0 kh\u00f4ng c\u1ea7n in l\u1ea1i. Ch\u00fang c\u0169ng hi\u1ec3n th\u1ecb s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea qu\u00e9t. M\u00e3 \u0111\u1ed9ng ho\u1ea1t \u0111\u1ed9ng khi g\u00f3i c\u1ee7a b\u1ea1n \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u00e0 tr\u1edf n\u00ean kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng sau khi g\u00f3i tr\u1ea3 ph\u00ed k\u1ebft th\u00fac. B\u1ea1n c\u00f3 th\u1ec3 th\u1eed ch\u00fang v\u1edbi b\u1ea3n d\u00f9ng th\u1eed mi\u1ec5n ph\u00ed 14 ng\u00e0y, v\u00e0 c\u00e1c g\u00f3i \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea t\u1ea1i <a href=\"https:\/\/pageloot.com\/vi\/pricing\/\">pageloot.com\/pricing<\/a>. Qu\u00e9t kh\u00f4ng gi\u1edbi h\u1ea1n \u0111\u01b0\u1ee3c bao g\u1ed3m, v\u00e0 c\u00e1c g\u00f3i \u0111i k\u00e8m v\u1edbi \u0111\u1ea3m b\u1ea3o ho\u00e0n ti\u1ec1n trong 30 ng\u00e0y.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Theo d\u00f5i chi\u1ebfn d\u1ecbch c\u1ee7a b\u1ea1n trong th\u1eddi gian th\u1ef1c<\/strong> B\u1ea1n mu\u1ed1n bi\u1ebft kh\u00e1ch h\u00e0ng qu\u00e9t t\u00e0i li\u1ec7u c\u1ee7a b\u1ea1n \u1edf \u0111\u00e2u v\u00e0 khi n\u00e0o? S\u1eed d\u1ee5ng <a href=\"https:\/\/pageloot.com\/vi\/qr-code-generator\/\">tr\u00ecnh t\u1ea1o m\u00e3 QR<\/a> \u0111\u1ec3 t\u1ea1o m\u00e3 c\u00f3 th\u1ec3 theo d\u00f5i v\u00e0 xem c\u00e1c l\u01b0\u1ee3t qu\u00e9t theo th\u1eddi gian, \u0111\u1ecba \u0111i\u1ec3m v\u00e0 thi\u1ebft b\u1ecb trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n c\u1ee7a b\u1ea1n.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Ch\u1ea5t l\u01b0\u1ee3ng in v\u00e0 v\u1eadt li\u1ec7u n\u1ec1n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Lu\u00f4n in t\u1eeb t\u1ec7p vector nh\u01b0 SVG, PDF ho\u1eb7c EPS. M\u1ed9t t\u1ec7p PNG ho\u1eb7c JPG nh\u1ecf s\u1ebd c\u00f3 c\u1ea1nh m\u1ec1m khi ph\u00f3ng to, v\u00e0 c\u00e1c c\u1ea1nh m\u1edd l\u00e0m cho c\u00e1c m\u00f4-\u0111un li\u1ec1n k\u1ec1 b\u1ecb l\u1eabn v\u00e0o nhau. B\u00e0i vi\u1ebft <a href=\"https:\/\/pageloot.com\/vi\/blog\/how-printing-techniques-impact-qr-code-scannability\/\">t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c k\u1ef9 thu\u1eadt in<\/a> gi\u1ea3i th\u00edch s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa in offset v\u00e0 in k\u1ef9 thu\u1eadt s\u1ed1. N\u1ebfu b\u1ea1n ph\u1ea3i s\u1eed d\u1ee5ng PNG, h\u00e3y xu\u1ea5t \u1edf k\u00edch th\u01b0\u1edbc l\u1edbn, v\u00ed d\u1ee5 1000 pixel tr\u1edf l\u00ean cho m\u00e3 \u0111\u01b0\u1ee3c in \u1edf 5 cm.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/04\/square-illustration-0c1c16-6468eb41e670.webp\" alt=\"So s\u00e1nh ch\u1ea5t l\u01b0\u1ee3ng in\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u00f3i l\u00e0 v\u1ea5n \u0111\u1ec1 in \u1ea5n th\u1ee9 hai. Gi\u1ea5y b\u00f3ng, th\u1ee7y tinh v\u00e0 bao b\u00ec nh\u1ef1a ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng v\u00e0o \u1ed1ng k\u00ednh v\u00e0 l\u00e0m m\u1edd c\u00e1c m\u00f4-\u0111un. S\u1eed d\u1ee5ng b\u1ec1 m\u1eb7t m\u1edd v\u00e0 \u0111\u1eb7t m\u00e3 tr\u00ean m\u1ed9t khu v\u1ef1c ph\u1eb3ng, kh\u00f4ng ph\u1ea3i tr\u00ean chai cong ho\u1eb7c c\u1ea1nh g\u1ea5p. N\u1ebfu m\u00e3 ph\u1ea3i n\u1eb1m tr\u00ean b\u1ec1 m\u1eb7t cong, h\u00e3y l\u00e0m cho n\u00f3 l\u1edbn h\u01a1n \u0111\u1ec3 b\u00f9 \u0111\u1eafp s\u1ef1 bi\u1ebfn d\u1ea1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Th\u1ebb m\u00e3 QR v\u00e0 b\u1ec1 m\u1eb7t kim lo\u1ea1i kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c th\u1ebb kim lo\u1ea1i, t\u1ea5m kh\u1eafc v\u00e0 nh\u00e3n d\u00e1n tr\u00ean thi\u1ebft b\u1ecb th\u01b0\u1eddng g\u1eb7p l\u1ed7i nhi\u1ec1u h\u01a1n gi\u1ea5y, v\u00ec ba l\u00fd do. Kim lo\u1ea1i s\u00e1ng b\u00f3ng ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng v\u00e0 che \u0111i c\u00e1c m\u00f4-\u0111un. M\u00e3 \u0111\u01b0\u1ee3c kh\u1eafc laser ho\u1eb7c kh\u1eafc th\u01b0\u1eddng c\u00f3 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n th\u1ea5p gi\u1eefa c\u00e1c khu v\u1ef1c \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u v\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u. C\u00e1c th\u1ebb nh\u1ecf bu\u1ed9c ph\u1ea3i s\u1eed d\u1ee5ng c\u00e1c m\u00f4-\u0111un r\u1ea5t nh\u1ecf.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>S\u1eed d\u1ee5ng b\u1ec1 m\u1eb7t m\u1edd ho\u1eb7c \u0111\u01b0\u1ee3c ch\u1ea3i, ho\u1eb7c b\u1ec1 m\u1eb7t anot h\u00f3a ho\u1eb7c s\u01a1n, thay v\u00ec kim lo\u1ea1i \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng.<\/li><li>T\u1ea1o \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n r\u00f5 r\u00e0ng. S\u01a1n \u0111en ho\u1eb7c m\u1ef1c \u0111en tr\u00ean kim lo\u1ea1i nh\u1ea1t m\u00e0u ho\u1eb7c nh\u00e3n tr\u1eafng \u0111\u00e1ng tin c\u1eady h\u01a1n m\u1ed9t v\u1ebft kh\u1eafc m\u1edd.<\/li><li>Gi\u1eef v\u00f9ng y\u00ean t\u0129nh kh\u00f4ng c\u00f3 \u1ed1c v\u00edt, c\u1ea1nh v\u00e0 ch\u1eef kh\u1eafc.<\/li><li>S\u1eed d\u1ee5ng m\u1ed9t li\u00ean k\u1ebft ng\u1eafn, \u0111\u1ec3 m\u00e3 c\u00f3 \u00edt m\u00f4-\u0111un h\u01a1n v\u00e0 l\u1edbn h\u01a1n. M\u00e3 \u0111\u1ed9ng h\u1eefu \u00edch \u1edf \u0111\u00e2y, v\u00ec m\u1ed9t th\u1ebb kim lo\u1ea1i kh\u00f4ng th\u1ec3 in l\u1ea1i r\u1ebb ti\u1ec1n.<\/li><li>Ki\u1ec3m tra th\u1ebb \u0111\u00e3 ho\u00e0n th\u00e0nh v\u1edbi hai \u0111i\u1ec7n tho\u1ea1i, d\u01b0\u1edbi \u00e1nh s\u00e1ng ban ng\u00e0y v\u00e0 trong \u00e1nh s\u00e1ng trong nh\u00e0, tr\u01b0\u1edbc khi b\u1ea1n \u0111\u1eb7t h\u00e0ng m\u1ed9t l\u00f4.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 thi\u1ebft b\u1ecb v\u00e0 m\u00f4i tr\u01b0\u1eddng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00f4i khi m\u00e3 v\u1eabn t\u1ed1t v\u00e0 thi\u1ebft b\u1ecb ho\u1eb7c \u0111\u1ecba \u0111i\u1ec3m l\u00e0 v\u1ea5n \u0111\u1ec1. \u00c1nh s\u00e1ng y\u1ebfu l\u00e0m gi\u1ea3m \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n, v\u00e0 \u1ed1ng k\u00ednh m\u00e1y \u1ea3nh b\u1ea9n l\u00e0m cho h\u00ecnh \u1ea3nh m\u1edd. Y\u00eau c\u1ea7u ng\u01b0\u1eddi d\u00f9ng lau \u1ed1ng k\u00ednh v\u00e0 gi\u1eef \u0111i\u1ec7n tho\u1ea1i c\u00e1ch m\u00e3 nh\u1ecf 4 \u0111\u1ebfn 12 inch (10 \u0111\u1ebfn 30 cm). \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i <a href=\"https:\/\/pageloot.com\/vi\/blog\/how-to-test-qr-codes-for-mobile-usability\/\">ki\u1ec3m tra m\u00e3 QR v\u1ec1 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng tr\u00ean thi\u1ebft b\u1ecb di \u0111\u1ed9ng<\/a> tr\u00ean \u0111i\u1ec7n tho\u1ea1i Android v\u00e0 iOS c\u0169 c\u0169ng nh\u01b0 m\u1edbi.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>iPhone: m\u1edf \u1ee9ng d\u1ee5ng Camera v\u00e0 h\u01b0\u1edbng v\u00e0o m\u00e3. Ki\u1ec3m tra xem C\u00e0i \u0111\u1eb7t, Camera, Qu\u00e9t m\u00e3 QR \u0111\u00e3 \u0111\u01b0\u1ee3c b\u1eadt ch\u01b0a.<\/li><li>Android: s\u1eed d\u1ee5ng \u1ee9ng d\u1ee5ng Camera ho\u1eb7c Google Lens. N\u1ebfu kh\u00f4ng c\u00f3 g\u00ec x\u1ea3y ra, h\u00e3y m\u1edf Google Lens tr\u1ef1c ti\u1ebfp.<\/li><li>Kh\u00f4ng c\u00f3 internet: qu\u00e1 tr\u00ecnh qu\u00e9t ho\u1ea1t \u0111\u1ed9ng, nh\u01b0ng trang s\u1ebd kh\u00f4ng t\u1ea3i. \u0110i\u1ec1u n\u00e0y tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t m\u00e3 b\u1ecb h\u1ecfng, nh\u01b0ng kh\u00f4ng ph\u1ea3i v\u1eady.<\/li><li>Li\u00ean k\u1ebft m\u1edf sai trang ho\u1eb7c b\u00e1o l\u1ed7i: \u0111\u00edch \u0111\u1ebfn \u0111\u00e3 thay \u0111\u1ed5i. Ki\u1ec3m tra URL v\u00e0 s\u1eed d\u1ee5ng m\u00e3 \u0111\u1ed9ng n\u1ebfu b\u1ea1n c\u1ea7n thay \u0111\u1ed5i sau n\u00e0y.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n \u0111\u1eb7t logo v\u00e0o gi\u1eefa m\u00e3, h\u00e3y \u0111\u1eb7t m\u1ee9c s\u1eeda l\u1ed7i th\u00e0nh Q (25%) ho\u1eb7c H (30%). C\u00e1c m\u1ee9c l\u00e0 L 7%, M 15%, Q 25% v\u00e0 H 30% c\u1ee7a m\u1eabu c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng m\u00e0 v\u1eabn c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c. M\u1ee9c cao h\u01a1n s\u1ebd th\u00eam c\u00e1c m\u00f4-\u0111un, v\u00ec v\u1eady h\u00e3y gi\u1eef logo nh\u1ecf v\u00e0 ki\u1ec3m tra. Xem <a href=\"https:\/\/pageloot.com\/vi\/blog\/qr-code-usability-best-practices\/\">c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng m\u00e3 QR<\/a> \u0111\u1ec3 ki\u1ec3m tra c\u00e1c thi\u1ebft k\u1ebf th\u01b0\u01a1ng hi\u1ec7u trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng th\u1ef1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t m\u00e3 \u0111\u00e1ng tin c\u1eady c\u1ea7n k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p, \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n cao, l\u1ec1 r\u00f5 r\u00e0ng, in vector s\u1ea1ch v\u00e0 m\u1ed9t li\u00ean k\u1ebft ng\u1eafn g\u1ecdn. H\u00e3y ki\u1ec3m tra n\u00f3 tr\u00ean nhi\u1ec1u h\u01a1n m\u1ed9t \u0111i\u1ec7n tho\u1ea1i tr\u01b0\u1edbc khi b\u1ea1n in s\u1ed1 l\u01b0\u1ee3ng l\u1edbn.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/04\/fix-qr-scan-a3de25-1d7758609eb0.webp\" alt=\"Infographic s\u1eeda l\u1ed7i qu\u00e9t QR\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-000000000000\"><strong class=\"schema-faq-question\">T\u1ea1i sao m\u00e3 QR c\u1ee7a t\u00f4i b\u1ecb m\u1edd khi t\u00f4i in?<\/strong> <p class=\"schema-faq-answer\">\u0110\u1ed9 m\u1edd th\u01b0\u1eddng \u0111\u1ebfn t\u1eeb m\u1ed9t t\u1ec7p c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p nh\u01b0 JPG ho\u1eb7c PNG nh\u1ecf. T\u1ea3i m\u00e3 d\u01b0\u1edbi d\u1ea1ng SVG ho\u1eb7c PDF, c\u00f3 th\u1ec3 ph\u00f3ng to m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 in tr\u00ean b\u1ec1 m\u1eb7t m\u1edd.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-000000000001\"><strong class=\"schema-faq-question\">T\u00f4i c\u00f3 th\u1ec3 thay \u0111\u1ed5i li\u00ean k\u1ebft trong m\u00e3 QR c\u1ee7a m\u00ecnh sau khi in kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Ch\u1ec9 khi \u0111\u00f3 l\u00e0 m\u00e3 QR \u0111\u1ed9ng. M\u00e3 t\u0129nh l\u01b0u tr\u1eef \u0111i\u1ec3m \u0111\u1ebfn trong m\u1eabu, do \u0111\u00f3 kh\u00f4ng th\u1ec3 ch\u1ec9nh s\u1eeda \u0111\u01b0\u1ee3c. M\u00e3 \u0111\u1ed9ng s\u1eed d\u1ee5ng m\u1ed9t li\u00ean k\u1ebft chuy\u1ec3n h\u01b0\u1edbng, v\u00ec v\u1eady b\u1ea1n c\u00f3 th\u1ec3 thay \u0111\u1ed5i \u0111i\u1ec3m \u0111\u1ebfn trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n c\u1ee7a m\u00ecnh b\u1ea5t c\u1ee9 l\u00fac n\u00e0o.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-000000000002\"><strong class=\"schema-faq-question\">T\u1ea1i sao camera iPhone ho\u1eb7c Android c\u1ee7a t\u00f4i kh\u00f4ng nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c m\u00e3?<\/strong> <p class=\"schema-faq-answer\">C\u00e1c nguy\u00ean nh\u00e2n th\u01b0\u1eddng g\u1eb7p l\u00e0 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n th\u1ea5p, thi\u1ebfu v\u00f9ng y\u00ean t\u0129nh, m\u00e3 qu\u00e1 nh\u1ecf ho\u1eb7c b\u1ecb ch\u00f3i. H\u00e3y ki\u1ec3m tra \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o l\u1ec1 r\u1ed9ng \u00edt nh\u1ea5t 4 m\u00f4-\u0111un, c\u00e1c m\u00f4-\u0111un t\u1ed1i h\u01a1n nhi\u1ec1u so v\u1edbi n\u1ec1n v\u00e0 m\u00e3 r\u1ed9ng \u00edt nh\u1ea5t 2 cm.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-000000000003\"><strong class=\"schema-faq-question\">T\u1ea1i sao m\u00e3 QR tr\u00ean th\u1ebb kim lo\u1ea1i c\u1ee7a t\u00f4i kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c?<\/strong> <p class=\"schema-faq-answer\">Kim lo\u1ea1i s\u00e1ng b\u00f3ng ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng v\u00e0 c\u00e1c v\u1ebft kh\u1eafc th\u01b0\u1eddng c\u00f3 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n th\u1ea5p. H\u00e3y s\u1eed d\u1ee5ng b\u1ec1 m\u1eb7t m\u1edd ho\u1eb7c s\u01a1n, m\u00e0u \u0111en t\u01b0\u01a1ng ph\u1ea3n cao tr\u00ean n\u1ec1n s\u00e1ng, m\u1ed9t l\u1ec1 r\u00f5 r\u00e0ng v\u00e0 m\u1ed9t li\u00ean k\u1ebft ng\u1eafn, sau \u0111\u00f3 ki\u1ec3m tra th\u1ebb tr\u00ean hai \u0111i\u1ec7n tho\u1ea1i.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-000000000004\"><strong class=\"schema-faq-question\">M\u00e3 QR c\u00f3 h\u1ebft h\u1ea1n kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">M\u00e3 QR t\u0129nh kh\u00f4ng bao gi\u1edd h\u1ebft h\u1ea1n. M\u00e3 \u0111\u1ed9ng ho\u1ea1t \u0111\u1ed9ng khi g\u00f3i c\u1ee7a b\u1ea1n \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u00e0 tr\u1edf n\u00ean kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng sau khi g\u00f3i tr\u1ea3 ph\u00ed k\u1ebft th\u00fac.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-000000000005\"><strong class=\"schema-faq-question\">M\u00e3 QR n\u00ean c\u00f3 k\u00edch th\u01b0\u1edbc bao nhi\u00eau?<\/strong> <p class=\"schema-faq-answer\">\u00cdt nh\u1ea5t 2 x 2 cm (0.8 x 0.8 inch) cho c\u00e1c v\u1eadt th\u1ec3 \u1edf c\u1ef1 ly g\u1ea7n. \u0110\u1ed1i v\u1edbi qu\u00e9t \u1edf kho\u1ea3ng c\u00e1ch xa, s\u1eed d\u1ee5ng chi\u1ec1u r\u1ed9ng 1 feet cho m\u1ed7i 10 feet kho\u1ea3ng c\u00e1ch.<\/p> <\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u00e3 QR b\u1ecb l\u1ed7i v\u00e0 t\u00ecm hi\u1ec3u c\u00e1ch kh\u1eafc ph\u1ee5c c\u00e1c v\u1ea5n \u0111\u1ec1 qu\u00e9t. T\u1ed1i \u01b0u h\u00f3a k\u00edch th\u01b0\u1edbc, \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n v\u00e0 v\u00f9ng y\u00ean t\u0129nh ho\u1eb7c s\u1eed d\u1ee5ng m\u00e3 \u0111\u1ed9ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o qu\u00e9t \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"author":17,"featured_media":53174,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-2932","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-qr-code-marketing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>QR Code Not Scanning? 6 Fixes That Work<\/title>\n<meta name=\"description\" content=\"QR code not scanning? 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V\u1edbi chuy\u00ean m\u00f4n s\u00e2u s\u1eafc k\u00e9o d\u00e0i h\u01a1n 5 n\u0103m ch\u1ec9 v\u1ec1 m\u00e3 QR, Siim \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t chuy\u00ean gia v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y trong l\u0129nh v\u1ef1c n\u00e0y. Anh \u1ea5y \u0111\u00e3 c\u00f3 nh\u1eefng b\u01b0\u1edbc ti\u1ebfn \u0111\u00e1ng k\u1ec3 trong vi\u1ec7c t\u1eadn d\u1ee5ng c\u00f4ng ngh\u1ec7 QR \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a v\u00e0 t\u0103ng c\u01b0\u1eddng c\u00e1c t\u01b0\u01a1ng t\u00e1c k\u1ef9 thu\u1eadt s\u1ed1. Cu\u1ed9c h\u00e0nh tr\u00ecnh c\u1ee7a anh kh\u00f4ng ch\u1ec9 b\u1eaft \u0111\u1ea7u \u1edf \u0111\u00e2y. Siim c\u00f3 n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt s\u1ed1 s\u00e2u r\u1ed9ng v\u1edbi h\u01a1n 10 n\u0103m kinh nghi\u1ec7m v\u1eefng ch\u1eafc trong l\u0129nh v\u1ef1c Ph\u1ea7n m\u1ec1m d\u01b0\u1edbi d\u1ea1ng d\u1ecbch v\u1ee5 (SaaS), m\u1ed9t minh ch\u1ee9ng cho ki\u1ebfn th\u1ee9c s\u00e2u r\u1ed9ng c\u1ee7a \u00f4ng v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt s\u1ed1.","sameAs":["https:\/\/www.linkedin.com\/in\/siim-tiigimagi\/"]},{"@type":"Question","@id":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000000","position":1,"url":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000000","name":"T\u1ea1i sao m\u00e3 QR c\u1ee7a t\u00f4i b\u1ecb m\u1edd khi t\u00f4i in?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Blurriness usually comes from a low-resolution file such as a small JPG or PNG. Download the code as SVG or PDF, which can be enlarged without losing quality, and print on a matte surface.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000001","position":2,"url":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000001","name":"T\u00f4i c\u00f3 th\u1ec3 thay \u0111\u1ed5i li\u00ean k\u1ebft trong m\u00e3 QR c\u1ee7a m\u00ecnh sau khi in kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Only if it is a dynamic QR code. A static code stores the destination in the pattern, so it cannot be edited. A dynamic code uses a redirect link, so you can change the destination in your dashboard at any time.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000002","position":3,"url":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000002","name":"T\u1ea1i sao camera iPhone ho\u1eb7c Android c\u1ee7a t\u00f4i kh\u00f4ng nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c m\u00e3?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The usual causes are low contrast, a missing quiet zone, a code that is too small, or glare. Check that the margin is at least 4 modules, the modules are much darker than the background, and the code is at least 2 cm wide.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000003","position":4,"url":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000003","name":"T\u1ea1i sao m\u00e3 QR tr\u00ean th\u1ebb kim lo\u1ea1i c\u1ee7a t\u00f4i kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Shiny metal reflects light, and etched marks often have low contrast. Use a matte or painted surface, high-contrast black on a light area, a clear margin and a short link, then test the tag on two phones.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000004","position":5,"url":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000004","name":"M\u00e3 QR c\u00f3 h\u1ebft h\u1ea1n kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Static QR codes never expire. Dynamic codes work while your plan is active and become inactive after a paid plan ends.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000005","position":6,"url":"https:\/\/pageloot.com\/qr-code-marketing\/why-qr-code-not-working\/#faq-question-000000000005","name":"M\u00e3 QR n\u00ean c\u00f3 k\u00edch th\u01b0\u1edbc bao nhi\u00eau?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"At least 2 x 2 cm (0.8 x 0.8 inches) for close-range items. For distance scanning, use 1 foot of width for every 10 feet of distance.","inLanguage":"vi"},"inLanguage":"vi"}]}},"_links":{"self":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/2932","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/comments?post=2932"}],"version-history":[{"count":5,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/2932\/revisions"}],"predecessor-version":[{"id":56918,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/2932\/revisions\/56918"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media\/53174"}],"wp:attachment":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media?parent=2932"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/categories?post=2932"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/tags?post=2932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}