Perhaps you should try some spelling variations:
trung thanh » truong thanh
thanh trung » thanh tung
thanh hung » thanh huong, thanh tung, thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
cong hoan » cong hoa, dong hoa, cong ha
thanh cau » thanh chau, thanh mau, nhanh cau
cong san » cong tac

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 (hieu qua)) - thanh trung thanh hung ((cong hoan) OR (cong san)) thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu qua)) - thanh trung thanh hung ((cong hoan) OR (cong san)) thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (hieu qua)) - thanh trung thanh hung ((cong hoan) OR (cong san)) thanh cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (hieu qua)) - thanh trung thanh hung ((cong hoan) OR (cong san)) thanh cau*.