Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
thanh man » thanh san, thanh van, thanh tan
thanh mau » hanh mau, thanh san, thanh hai
hoi hieu » hoi phieu, hoi tieu, moi hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - hanh tranh cua ((nhung cong) OR (hang cong)) tan ((thanh man) or (thanh mau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - hanh tranh cua ((nhung cong) OR (hang cong)) tan ((thanh man) OR (thanh mau))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi hieu lang - hanh tranh cua ((nhung cong) OR (hang cong)) tan ((thanh man) or (thanh mau))*".