Perhaps you should try some spelling variations:
sach tham » sach nha
tham lang » nham nang, pham hang, thai bang
thai cua » than cua, tai cuc, tri cua
te sach » toc sach
da thai » dao thai, do thai, ca thai
qua cac » cua cac
van hoi » van hoc, van hoe, van loi
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

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 tham lang ((van hoi) OR (van hoa)). hieu qua cac ((xuc va) or (luc va)) da thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tham lang ((van hoi) OR (van hoa)). hieu qua cac ((xuc va) OR (luc va)) da thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tham lang ((van hoi) OR (van hoa)). hieu qua cac ((xuc va) or (luc va)) da thai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach tham lang ((van hoi) OR (van hoa)). hieu qua cac ((xuc va) or (luc va)) da thai cua tre*.