Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, hieu lang, nhiet nang
hieu quang » thieu quang, hieu quan, hieu qua
tong cong » trong cong, cong cong, dung cong
trung va » truong va, trang va, trung ha
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban
va tong » va thong, va tuong, va trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((nhieu tang) or (hieu quang)) - thanh trung va tong cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((nhieu tang) OR (hieu quang)) - thanh trung va tong cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: ho ((nhieu tang) or (hieu quang)) - thanh trung va tong cong dan toan tap*.