Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cham xuc » cam xuc, chat xuc, cham soc
te sach » toc sach
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lua tre » cua tre, luy tre, dua tren
xuc va » duc va, tuc va, luc va
vi lua » vi luu
x hoi » xa hoi, o hoi, x ho
o hoc » co hoc, mo hoc, so hoc

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: ((te sach) OR (hoc sach)) ky nang ((x hoi) OR (o hoc)). hieu ve cham xuc va hanh vi lua tre~.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky nang ((x hoi) or (o hoc)). hieu ve cham xuc va hanh vi lua tre*.