Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung tuan, trung cap
30 trieu » 25 trieu
van toan » van tuan, van tan, van thanh
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: 30 trieu tinh - thanh trung cua ((nhung cong) OR (thong cong)) ((van toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: 30 trieu tinh - thanh trung cua ((nhung cong) OR (thong cong)) ((van toan) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "30 trieu tinh - thanh trung cua ((nhung cong) OR (thong cong)) ((van toan) or (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: 30 trieu tinh - thanh trung cua ((nhung cong) OR (thong cong)) ((van toan) or (dan than)) cau*.