Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
so sach » so sanh, bo sach, co sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
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, 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: so sach tu nang x hoi. 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 sach tu nang x hoi. hieu ((ve pham) OR (vi pham)) duc va danh vai cua te.
• Adding a wildcard symbol may retrieve word variants: so sach tu nang x hoi. hieu ((ve pham) or (vi pham)) duc va danh vai cua te*.