Perhaps you should try some spelling variations:
thanh luong » thanh huong, thanh long, thanh cuong
phung cong » nhung cong, phong cong, nhung chong
hieu manh » chieu xanh, hieu nganh, dieu hanh
luong tai » dung tai, luong va
hung cong » nhung cong, hung cuong, dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
san van » tan van, luan van, tran van

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 - thanh luong tai ((hung cong) or (phung cong)) san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh luong tai ((hung cong) OR (phung cong)) san van ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh luong tai ((hung cong) or (phung cong)) san van ban*.