Perhaps you should try some spelling variations:
thanh trung » thanh tung
mot trieu » mot chieu, mot tri, mon triet
25 trieu » 30 trieu
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot trieu) or (25 trieu)) tinh - thanh trung ((cua dung) or (cua dang)) cong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot trieu) OR (25 trieu)) tinh - thanh trung ((cua dung) OR (cua dang)) cong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: ((mot trieu) or (25 trieu)) tinh - thanh trung ((cua dung) or (cua dang)) cong tap toan cau*.