Perhaps you should try some spelling variations:
cam thuoc » cay thuoc, nam thuoc, lam thuoc
thuoc ban » thuoc tan, thuoc dang, thu ban
vu khach » vu khanh, vu khac, vay khach
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
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 khach) or (te sach)) ky nang x hoi. lieu va cam thuoc ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (te sach)) ky nang x hoi. lieu va cam thuoc ban hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (te sach)) ky nang x hoi. lieu va cam thuoc ban hanh vai cua tre*.