Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cham xuc » cam xuc, chat xuc, cham soc
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
van anh » van thanh, van minh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai
tuan » quan, tran, luan

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