Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
co sach » cuon sach, hoc sach
bo sach » hoc sach
ty nang » ky nang, ty xang, ty hang
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
v pham » d pham
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

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