Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
chiet tach » chieu sach
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
dung cong » dung trong
van thanh » ban thanh, van tuan
thanh cap » thanh lap, hanh cap, than cap

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) or (chiet tach)) - canh tranh cua ((nhung cong) OR (dung cong)) van thanh cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chiet tach)) - canh tranh cua ((nhung cong) OR (dung cong)) van thanh cap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chiet tach)) - canh tranh cua ((nhung cong) OR (dung cong)) van thanh cap*".