Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
tang sach » sang sach, nang sach, tvqg sach
tran tran » tan tran, tran tuan, tran tan
tran dung » tran dang, tran hung, tran quang
dung cong » dung trong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 tran tran dung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tang sach) OR (mang sach)) - thanh tran tran dung cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((tang sach) or (mang sach)) - thanh tran tran dung cong tac toan cao*.