Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
manh toan » thanh toan, anh tuan, tinh toan
theo kha » theo phap, thao khoa, theo chu
kha nang » phap nang, ky nang, ki nang
tang cua » mang cua, tang luan, thong cua
hang cua » mang cua, hang ca, huong cua
dan toan » van toan, dan than, xuan toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo kha nang - hanh ((tang cua) or (hang cua)) nhung cong ((dan toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo kha nang - hanh ((tang cua) OR (hang cua)) nhung cong ((dan toan) OR (manh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: theo kha nang - hanh ((tang cua) or (hang cua)) nhung cong ((dan toan) or (manh toan)) cau*.