Perhaps you should try some spelling variations:
doc sach » toc sach, nuoc sach, dac sac
hoc sach » hoc sinh, hoc cac, hoc anh
van hang » van khang, van hoang, van thang
hang tai » hang va, dung tai
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) or (hoc sach)) ky nang x hoi. hieu va cac xuc van hang tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (hoc sach)) ky nang x hoi. hieu va cac xuc van hang tai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((doc sach) or (hoc sach)) ky nang x hoi. hieu va cac xuc van hang tai cua tre*.