L? mc ng v?i s?m c?n m?t c  r?ng th c?ng khg c?n thi?t ph?i ??i l?i ? nh ?a d?ng b?n cs? th h m?c r?ng l?m. Chuy?n r?ng h?n m?t t?o ch?c ch?n lch?ng h? lv?n ?? so v?i nh?ng ng??i ti d