Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
dang cong » dung cong
doan phan » doanh phan, toan phan, doanh nhan
dan phan » dan chan, van phan, dam phan
ho hieu » ho chieu, hoi hieu, nho hieu

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 lang - canh tranh cua ((nhung cong) or (dang cong)) ((dan phan) or (doan phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - canh tranh cua ((nhung cong) OR (dang cong)) ((dan phan) OR (doan phan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh tranh cua ((nhung cong) or (dang cong)) ((dan phan) or (doan phan)) cau*.