Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
nhieu tang » chieu sang, nhiet nang
thanh chau » thanh cha, thanh cham, thanh chu
hieu lang » chieu sang, hieu quang, hieu van
tranh cua » doanh cua, manh cua
cong bang » cuong bang, dong bang, hong bang
cua hang » cua dang, cua nhung, cua cong
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu lang) OR (nhieu tang)) - hanh tranh cua hang ((cong bang) or (cong tan)) thanh chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu lang) OR (nhieu tang)) - hanh tranh cua hang ((cong bang) OR (cong tan)) thanh chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu lang) OR (nhieu tang)) - hanh tranh cua hang ((cong bang) or (cong tan)) thanh chau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu lang) OR (nhieu tang)) - hanh tranh cua hang ((cong bang) or (cong tan)) thanh chau*.