Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
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
cua khong » hua khong, cua phuong, cua thuong
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chua xang - hanh tranh cua khong cong ((tac toan) OR (tam toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo chua xang - hanh tranh cua khong cong ((tac toan) OR (tam toan)) cau*.