Perhaps you should try some spelling variations:
tang sach » sang sach, nang sach, tvqg sach
thanh tra » thanh toan, thanh hoa
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong
tra tuan » tran tuan, tra quan, tri tuan
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((tang sach) or (mang sach)) - thanh tra tuan dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tang sach) OR (mang sach)) - thanh tra tuan dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((tang sach) or (mang sach)) - thanh tra tuan dung cong tac toan cau*.