K\u00ednh ch\u00e0o to\u00e0n th\u1ec3 qu\u00fd h\u1ed9i vi\u00ean , h\u00f4m nay ch\u00fang ta s\u1ebd c\u00f3 c\u01a1 h\u1ed9i t\u00ecm hi\u1ec3u v\u1ec1 m\u1ed9t kh\u00e1i ni\u1ec7m kh\u00f4ng m\u1edbi nh\u01b0ng l\u1ea1i kh\u00e1 m\u01a1 h\u1ed3 v\u1edbi d\u00e2n ch\u01a1i \u0111\u1ec1 – \u0110\u00f3 ch\u00ednh l\u00e0 b\u1ed9 s\u1ed1 \u0111\u1ec1<\/strong>. S\u1eed d\u1ee5ng c\u00e1c b\u1ed9 \u0111\u1ec1 s\u1ebd gi\u00fap ng\u01b0\u1eddi ch\u01a1i ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c th\u1eddi gian soi c\u1ea7u, \u0111\u00e1nh \u0111\u1ec1 theo b\u1ed9 c\u00f2n gi\u00fap n\u00e2ng cao kh\u1ea3 n\u0103ng chi\u1ebfn th\u1eafng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 \u0111\u1ec1 b\u1ed9 c\u01a1 b\u1ea3n m\u00e0 b\u1ea5t c\u1ee9 d\u00e2n ch\u01a1i x\u1ed5 s\u1ed1 l\u00f4 \u0111\u1ec1 n\u00e0o c\u0169ng n\u00ean bi\u1ebft.<\/em><\/p>\n C\u00f3 l\u1ebd ch\u00fang ta \u0111\u00e3 kh\u00f4ng \u00edt l\u1ea7n nghe \u0111\u1ebfn b\u1ed9 l\u00f4 \u0111\u1ec1, b\u1ed9 l\u00f4 \u0111\u1ec1 gan, b\u1ed9 l\u00f4 \u0111\u1ec1 12 con gi\u00e1p hay b\u1ed9 l\u00f4 \u0111\u1ec1 s\u00e1t k\u00e9p …nh\u01b0ng l\u1ea1i kh\u00f4ng hi\u1ec3u r\u00f5 d\u1eabn \u0111\u1ebfn vi\u1ec7c ch\u1ecdn sai con s\u1ed1 v\u00e0 m\u1ea5t ti\u1ec1n.<\/p>\n