Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
theo kha » theo phap, thao khoa, thep nha
theo chu » theo chieu, cho chu, chao chu
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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 kha) OR (theo chu)) nang - hanh tranh cua nhung cong ((dan toan) OR (van toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo kha) OR (theo chu)) nang - hanh tranh cua nhung cong ((dan toan) or (van toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo kha) OR (theo chu)) nang - hanh tranh cua nhung cong ((dan toan) or (van toan)) cau*.