Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
danh lai » danh sai, gianh lai, dinh lam
sach ty » sach y, sach tu, xach tay
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va danh » va dinh, va dan, va hanh
lai cua » dai cua, hai cua, lai chau
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ty) OR (sach thu)) nang x hoi. hieu ve pham duc va danh lai cua te~.
• Adding a wildcard symbol may retrieve word variants: so ((sach ty) or (sach thu)) nang x hoi. hieu ve pham duc va danh lai cua te*.