Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - hanh ((trung va) or (trung ha)) nhung ((cong tan) or (cong san)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh ((trung va) OR (trung ha)) nhung ((cong tan) OR (cong san)) than cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((trung va) or (trung ha)) nhung ((cong tan) or (cong san)) than cao*.