Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu nganh » vien nganh, hiem ngan, hieu manh
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu nganh - thanh trung ((va hang) or (cam nang)) cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - thanh trung ((va hang) OR (cam nang)) cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - thanh trung ((va hang) or (cam nang)) cong dan than cao*.