Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien sach » kien sach, thien hach, chieu sach
dien sach » dien anh
trung van » truong van, trong van, trung va
dung cong » dung trong
van dung » van dong, xay dung, tin dung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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 ((hien sach) or (dien sach)) - thanh trung van dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (dien sach)) - thanh trung van dung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) or (dien sach)) - thanh trung van dung cong tan toan cau*.