Perhaps you should try some spelling variations:
nhanh mang » nhanh lang, hanh mang, nhanh quang
hanh trinh » canh tranh, hanh chinh
theo kha » theo phap, thao khoa, theo chu
kha nang » phap nang, ky nang, ki nang
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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 - ((nhanh mang) or (hanh trinh)) ((cua ban) or (cua cong)) cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo kha nang - ((nhanh mang) OR (hanh trinh)) ((cua ban) OR (cua cong)) cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: theo kha nang - ((nhanh mang) or (hanh trinh)) ((cua ban) or (cua cong)) cong dan chan cau*.