Perhaps you should try some spelling variations:
thanh trung » thanh tung
doc hieu » toc thieu, hoc thieu, hoc hien
trung va » truong va, trang va, trung ha
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cao » toan cao, thai cao, than cap
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: ((doc hieu) or (doi chi)) xanh - thanh trung va nhung ((cong dan) OR (cong san)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (doi chi)) xanh - thanh trung va nhung ((cong dan) OR (cong san)) than cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (doi chi)) xanh - thanh trung va nhung ((cong dan) OR (cong san)) than cao*".