Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
nang nong » nang song, hang nong, nang dong
hoc hieu » hoc thieu, hoc hien, doc hieu
tranh va » tranh van, trang va, trinh va
dan than » dan chan, ban than, van than
dam phan » d phan, va phan
van phan » van phong, van thanh, luan phan
va nang » van nang, da nang, cam nang

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 - canh tranh va nang nong ((((dan than) or (dam phan))) or (van phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh tranh va nang nong ((((dan than) OR (dam phan))) OR (van phan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh tranh va nang nong ((((dan than) or (dam phan))) or (van phan)) cau*.