Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
sach thu » sach thue, sach thieu, sach tham
cham doc » cham soc, chat doc, chau doc
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, xach tay
hieu ve » hieu van
xang ma » tang ma, nang ma, sang ma
ma hoi » mai hoi, xa hoi, ma hoa
doc va » duoc va, hoc va, duc va

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)) xang ma hoi. ((hieu ve) OR (hieu va)) cham doc va hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) xang ma hoi. ((hieu ve) OR (hieu va)) cham doc va hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach thu)) xang ma hoi. ((hieu ve) OR (hieu va)) cham doc va hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) xang ma hoi. ((hieu ve) OR (hieu va)) cham doc va hanh lai cua tre*.