Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh lai » hanh lam, hanh tai, thanh lap
sach thu » sach thue, sach thieu, sach tham
van hanh » van thanh, ban hanh, van anh
cao duc » dao duc, cao suc, giao duc
lai cua » dai cua, hai cua, lai chau
sach ty » sach y, sach tu, xach tay
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van

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 ty) or (sach thu)) lang xa hoi. hieu ve ((cao duc) or (pham duc)) van hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) lang xa hoi. hieu ve ((cao duc) OR (pham duc)) van hanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) lang xa hoi. hieu ve ((cao duc) or (pham duc)) van hanh lai cua viet*.