Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu sau » hieu suat, tieu su, hieu va
cham xuc » cam xuc, chat xuc, cham soc
hieu su » tieu su, hieu so, hieu suat
xuc van » duc van, luc van, vuc van
anh lai » anh bai, gianh lai, hanh lam
anh tai » hanh tai, anh thai, vanh tai
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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: toc sach y nang x hoi. ((hieu su) OR (hieu sau)) cham xuc van ((anh lai) OR (anh tai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang x hoi. ((hieu su) or (hieu sau)) cham xuc van ((anh lai) OR (anh tai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang x hoi. ((hieu su) or (hieu sau)) cham xuc van ((anh lai) OR (anh tai)) cua tre*.