Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trang vap » trang vai, trang van, tran van
doc hieu » hoc thieu, hoc hien
trang va » tran van, hang va
cong san » cong tac
san tran » tan tran, ban tran, dang tran
tran cao » toan cao, tran chau, trang cho

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 (toc thieu)) xanh - manh ((trang vap) or (trang va)) nhung cong san tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) xanh - manh ((trang vap) OR (trang va)) nhung cong san tran cao.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) xanh - manh ((trang vap) or (trang va)) nhung cong san tran cao*.