Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, nhung cong
hung vuong » hoang vuong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh nang » anh nang, ganh nang, hanh mang
nang quan » ban quan, nang suat
hieu van » hieu va, thien van, lieu va
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: theo ((hieu lang) OR (hieu van)) - hanh nang quan ((nhung tuong) OR (hung vuong)) dan than ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) or (hieu van)) - hanh nang quan ((nhung tuong) OR (hung vuong)) dan than ban~".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (hieu van)) - hanh nang quan ((nhung tuong) OR (hung vuong)) dan than ban*.