Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu nganh » hiem ngan, hieu manh, nghiep nganh
vien nganh » vien thanh
dang cong » dung cong
trung va » truong va, trang va, trung ha
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 dang » van dang, 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) or (vien nganh)) - thanh trung va dang cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (vien nganh)) - thanh trung va dang cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (vien nganh)) - thanh trung va dang cong dan than cao*.