Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh lam » thanh lap, hanh kem, hanh va
sach thu » sach thue, sach thieu, sach tham
hanh lai » hanh tai, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
hac duc » hoc duc, ha duc, thach duc
sach ty » sach y, sach tu, xach tay
lang xa » lang ha, dang xay, lang van
van hac » van hoc, van ha, van hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) OR (sach thu)) lang xa hoi. hieu van hac duc va ((hanh lai) or (hanh lam)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) lang xa hoi. hieu van hac duc va ((hanh lai) OR (hanh lam)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach thu)) lang xa hoi. hieu van hac duc va ((hanh lai) or (hanh lam)) cua viet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach thu)) lang xa hoi. hieu van hac duc va ((hanh lai) or (hanh lam)) cua viet*.