Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
ban hanh » ban hang
qua cac » cua cac
cac soc » cac toc, cac hoc, cham soc
soc ban » hoc ban, coc ban, so ban
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
y dang » ky dang, 2 dang, b dang
_ dang » _ dan, 2 dang, _ danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ((y dang) or (_ dang)) xa hoi. hieu qua cac soc ban hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((y dang) OR (_ dang)) xa hoi. hieu qua cac soc ban hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: hoc sach ((y dang) or (_ dang)) xa hoi. hieu qua cac soc ban hanh vi ((cua tre) or (cuu tre))*.