Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
ban thanh » ban hanh, ban hang
thanh doi » thanh loi, thanh moi, thanh do
vu khanh » vu thanh, van khanh, duy khanh
thu sach » tu sach, thuat sach, thuoc sach
thuc ban » thuoc ban, thuc dan, thu ban
hieu va » lieu va, hieu qua
va cham » va chat, va tham
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khanh) or (thu sach)) ky nang x hoi. hieu va cham thuc ban thanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khanh) OR (thu sach)) ky nang x hoi. hieu va cham thuc ban thanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu khanh) or (thu sach)) ky nang x hoi. hieu va cham thuc ban thanh doi cua tre*.