Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
vuc nang » cuc nang, vu nang, chuc nang
cham duc » pham duc, cham soc, pham duy
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua

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 ((v nang) OR (vuc nang)) xa hoi. hieu ve cham duc va hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: toc sach ((v nang) or (vuc nang)) xa hoi. hieu ve cham duc va hanh vi cua tre*.