Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
nhung cong » dung cong, thong cong, nhung don
canh manh » lanh manh, canh tranh, cach mang
hang cong » dang cong, hang nong, bang cong
dan phan » doan phan, dan chan, van phan
ho hieu » ho chieu, hoi hieu, nho hieu
manh va » hanh va, anh va, minh va

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: ho hieu quang - canh manh va ((nhung cong) OR (hang cong)) ((dan phan) OR (dan ca)) tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu quang - canh manh va ((nhung cong) OR (hang cong)) ((dan phan) or (dan ca)) tu~".
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - canh manh va ((nhung cong) OR (hang cong)) ((dan phan) or (dan ca)) tu*.