Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trang van » tran van, trang va, trong van
doc hieu » toc thieu, hoc hien
tram van » tran van, tam van, tranh van
cong san » cong tac
san than » sang than, san thanh, ban than
than cap » khan cap, thanh lap, thanh cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) nganh - hanh ((tram van) OR (trang van)) nhung cong san than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (hoc thieu)) nganh - hanh ((tram van) OR (trang van)) nhung cong san than cap~".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) nganh - hanh ((tram van) OR (trang van)) nhung cong san than cap*.