Perhaps you should try some spelling variations:
sach tham » sach nha
sach thue » sach thu, sach thieu, cach thuc
thai cua » than cua, tai cuc, tri cua
ca thai » chat thai, hoa thai
cac xuc » cam xuc, cac nuoc, chat xuc
qua cac » cua cac
van hoc » van hoa
cua tre » cua te, cuu tre, cua triet
van hoi » van hoa, van hoe, van loi
xuc va » duc va, tuc va, luc va
va ca » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach thue) or (sach tham)) lang ((van hoi) OR (van hoc)). hieu qua cac xuc va ca thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thue) OR (sach tham)) lang ((van hoi) OR (van hoc)). hieu qua cac xuc va ca thai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thue) or (sach tham)) lang ((van hoi) OR (van hoc)). hieu qua cac xuc va ca thai cua tre*".