em co' 1 cay Q121 bi ro't nuo'c ma^'t loa ngoa`i????????????co' loa trong ma` khong co' loa ngoai`!!!!
trong khi loa ngoa`i va` trong chung 1 loa???zay la` bi sao day???em fai la`m gi`?dong u lun rui` ma` khong he't...thay loa thu rui` ko het lun???sao day ma'y huynh???