Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
so sanh » do sanh
sanh ty » sach ty, canh tay
ty nang » ky nang, ty xang, ty hang
ve pham » v pham, ve phan, ve phat
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
cua te » cua tu
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ty nang ((x hoi) OR (x ho)). hieu ((ve pham) or (vi pham)) duc va danh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ty nang ((x hoi) OR (x ho)). hieu ((ve pham) OR (vi pham)) duc va danh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ty nang ((x hoi) OR (x ho)). hieu ((ve pham) or (vi pham)) duc va danh vai cua te".
• Adding a wildcard symbol may retrieve word variants: so sanh ty nang ((x hoi) OR (x ho)). hieu ((ve pham) or (vi pham)) duc va danh vai cua te*.