Perhaps you should try some spelling variations:
thanh tranh » thanh thanh, thanh tran, thanh trang
hieu quang » thieu quang, hieu quan, hieu qua
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
nha hieu » nha dieu, nghe hieu, phan hieu
tranh va » tranh van, trang va, trinh va
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: nha hieu quang - thanh tranh va ((nhung cong) or (dung cong)) tinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nha hieu quang - thanh tranh va ((nhung cong) OR (dung cong)) tinh toan tap.
• Adding a wildcard symbol may retrieve word variants: nha hieu quang - thanh tranh va ((nhung cong) or (dung cong)) tinh toan tap*.