Gi\u1ea3i t\u00edch – Ch\u01b0\u01a1ng 1 – B\u00e0i 5: Kh\u1ea3o s\u00e1t s\u1ef1 bi\u1ebfn thi\u00ean v\u00e0 v\u1ebd \u0111\u1ed3 th\u1ecb c\u1ee7a h\u00e0m s\u1ed1<\/a><\/blockquote><\/iframe>