Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doc hieu » toc thieu, hoc thieu, hoc hien
trang va » hang va
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cao » chan cho, chat cao, chay cao
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chi) or (doc hieu)) xanh - thanh ((trang va) OR (tran van)) nhung cong dan chan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chi) OR (doc hieu)) xanh - thanh ((trang va) OR (tran van)) nhung cong dan chan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chi) or (doc hieu)) xanh - thanh ((trang va) OR (tran van)) nhung cong dan chan cao".
• Adding a wildcard symbol may retrieve word variants: ((doi chi) or (doc hieu)) xanh - thanh ((trang va) OR (tran van)) nhung cong dan chan cao*.