Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
nhung cong » dung cong, thong cong, nhung don
hang cong » dang cong, hang nong, bang cong
van thanh » ban thanh, van tuan
thanh cac » hanh cac, thanh bac, thanh ca
chi sang » chi lang, chieu sang, chi chang
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sang - canh tranh luan ((nhung cong) or (hang cong)) van thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sang - canh tranh luan ((nhung cong) OR (hang cong)) van thanh cac*.