Perhaps you should try some spelling variations:
thanh trung » thanh tung
25 trieu » 30 trieu
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
cong van » cong vang, song van, cong tan
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: 25 trieu tinh - thanh trung ((cua dung) OR (qua dung)) ((cong van) OR (cong san)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "25 trieu tinh - thanh trung ((cua dung) OR (qua dung)) ((cong van) or (cong san)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: 25 trieu tinh - thanh trung ((cua dung) OR (qua dung)) ((cong van) or (cong san)) toan cau*.