Perhaps you should try some spelling variations:
quang thanh » quan thanh, hoang thanh, muong thanh
thanh quang » nhanh quang, thanh quan, than quang
thanh phung » thanh phuong, thanh hung, khanh phung
hieu quang » thieu quang, hieu quan, diep quang
phung cong » nhung cong, phong cong, nhung chong
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quang) OR (hieu qua)) - thanh quang thanh phung cong ((dan than) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (hieu qua)) - thanh quang thanh phung cong ((dan than) OR (dan chan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quang) OR (hieu qua)) - thanh quang thanh phung cong ((dan than) or (dan chan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) OR (hieu qua)) - thanh quang thanh phung cong ((dan than) or (dan chan)) cau*.