Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
manh toan » thanh toan, anh tuan, tinh toan
30 trieu » 25 trieu
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan

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: 30 trieu tinh - hanh tranh cua thong cong ((((tac toan) OR (tam toan))) OR (manh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "30 trieu tinh - hanh tranh cua thong cong ((((tac toan) OR (tam toan))) or (manh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: 30 trieu tinh - hanh tranh cua thong cong ((((tac toan) OR (tam toan))) or (manh toan)) cau*.