Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
ban trang » banh trang, ban trong, ban tran
trang van » tran van, trang va, trong van
van nhung » van nhuong, va nhung, van hung
hoc hieu » hoc thieu, hoc hien, doc hieu
cong san » cong tac
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - ban trang van nhung ((cong san) or (cong trinh)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ban trang van nhung ((cong san) OR (cong trinh)) phan lap.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ban trang van nhung ((cong san) or (cong trinh)) phan lap*.