Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, lanh tranh
hanh trang » thanh trung, canh tranh, hanh trinh
tong cong » trong cong, cong cong, dung cong
manh toan » thanh toan, anh tuan, tinh toan
30 trieu » 25 trieu
cua tong » cua cong, cua dong, cua nong
tac toan » tap toan, tam toan, hach 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) OR (hanh trang)) cua tong cong ((tac toan) OR (manh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "30 trieu tinh - ((hanh tranh) OR (hanh trang)) cua tong cong ((tac toan) or (manh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: 30 trieu tinh - ((hanh tranh) OR (hanh trang)) cua tong cong ((tac toan) or (manh toan)) cau*.