Perhaps you should try some spelling variations:
tanh dung » thanh dung, tinh dung, manh dung
manh toan » thanh toan, anh tuan, tinh toan
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
anh dung » anh dong, anh huong, sach dung
ban cong » bang cong, van cong, phan cong
dan than » dan chan, ban than, van than

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - ((anh dung) OR (tanh dung)) cua ban cong ((manh toan) OR (dan than)) cau~.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((anh dung) or (tanh dung)) cua ban cong ((manh toan) or (dan than)) cau*.