Perhaps you should try some spelling variations:
canh doanh » hanh doanh, chinh doanh, doanh doanh
cua nhung » va nhung
30 trieu » 25 trieu
cua dang » cua cong, cua ban
song tap » tong tap, song tam, cuong tap
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: 30 trieu tinh - canh doanh ((cua dang) or (cua nhung)) song tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: 30 trieu tinh - canh doanh ((cua dang) OR (cua nhung)) song tap toan cau.
• Adding a wildcard symbol may retrieve word variants: 30 trieu tinh - canh doanh ((cua dang) or (cua nhung)) song tap toan cau*.