Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
theo chua » theo chu, ho chua, cheo cua
chua xang » chua nang, chuc nang, chu bang
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
tich toan » tinh toan, tich than, trinh toan
cua tong » cua cong, cua dong, cua nong
tac toan » tam toan, hach toan, tac thanh
tap toan » tap doan, tap quan, bai 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: theo chua xang - hanh tranh cua tong cong ((((tac toan) OR (tich toan))) OR (tap toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: theo chua xang - hanh tranh cua tong cong ((((tac toan) or (tich toan))) or (tap toan)) cau*.