Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
hoi hieu » hoi phieu, hoi tieu, moi hieu
tran van » luan van
van hung » van dung, manh hung, van duong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap
ho hieu » ho chieu, nho hieu, co hieu

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

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