Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tranh » canh tranh, hanh trang, lanh tranh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
theo kha » theo phap, thao khoa, theo chu
kha nang » phap nang, ky nang, ki nang
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 nang - ((hanh tranh) OR (hanh trinh)) cua nhung cong ((dan toan) OR (van toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo kha nang - ((hanh tranh) OR (hanh trinh)) cua nhung cong ((dan toan) or (van toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo kha nang - ((hanh tranh) OR (hanh trinh)) cua nhung cong ((dan toan) or (van toan)) cau*.