Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hanh lai » hanh lam, hanh tai, thanh lap
cua viet » ca viet, hoa viet, cua vat
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
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: tu ((sach y) or (sach thu)) nang x hoi. hieu ve pham duc va hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach thu)) nang x hoi. hieu ve pham duc va hanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sach thu)) nang x hoi. hieu ve pham duc va hanh lai cua viet*.