Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu hang » thi hang, thuc hanh, thu huong
te sach » toc sach
hieu va » lieu va, hieu qua
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
va hoi » xa hoi, va hoc, va hoa
xuc va » duc va, tuc va, luc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu hang va hoi. hieu va cac ((xuc va) OR (tuc xa)) hanh vi ((cua tre) OR (cuu tre))~.
• Adding a wildcard symbol may retrieve word variants: te sach thu hang va hoi. hieu va cac ((xuc va) or (tuc xa)) hanh vi ((cua tre) or (cuu tre))*.