Perhaps you should try some spelling variations:
cham hoc » cham soc, chat hoc, cham hoi
dau tren » dau tien, dat tren, dau tieng
te sach » toc sach
ty nang » ky nang, ty hang, ly nang
va cham » va chat, va tham
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
di dau » doi dau, bi dau, di du

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 ((ty nang) OR (ty xang)) xa hoi. lieu va cham hoc va danh di dau tren~.
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) or (ty xang)) xa hoi. lieu va cham hoc va danh di dau tren*.