Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
vu khach » vu khanh, vu khac, vay khach
thu sach » tu sach, thuat sach, thuoc sach
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua
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: ((vu khach) OR (thu sach)) ky nang x hoi. lieu va cham thuc ban hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (thu sach)) ky nang x hoi. lieu va cham thuc ban hanh vi cua tre*.