B??c one: Ch?n “Menu” (bi?u t??ng 3 d?u g?ch ngang) ? Ch?n “??i th??ng” ? Ch?n ph??ng th?c ??i th??ng.  trong m?t kho?n th?i gian nh?t ??nh tr??c khi ?i?u ch?nh, t?t nh?t b?n nên dùng ph??ng pháp t? ??ng ho?c xây d?ng hàm ?? ki?m tra v?i d? li?u.You might be using a browser that won't supported by Facebook, so we've redirected you to