Perhaps you should try some spelling variations:
nang huong » nang thuong, hang thuong, bang phuong
nhieu tang » chieu sang, nhiet nang
nang luong » nang song
hieu lang » chieu sang, hieu quang, hieu van
tranh da » tranh dau, trinh da, tranh ha
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (nhieu tang)) - canh tranh da ((nang huong) OR (nang luong)) dan than ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu lang) OR (nhieu tang)) - canh tranh da ((nang huong) or (nang luong)) dan than ban~".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) OR (nhieu tang)) - canh tranh da ((nang huong) or (nang luong)) dan than ban*.