Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu hang » thi hang, thuc hanh, thu huong
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
hang xa » hoang xa, hang va, hang ca
van cac » van hac, van cau, van bac
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu hang xa hoi. hieu van cac ((xuc va) or (luc va)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu hang xa hoi. hieu van cac ((xuc va) OR (luc va)) hanh vi cua tre*.