Perhaps you should try some spelling variations:
thuoc ban » thuoc tan, thuoc dang, thu ban
cam thuoc » cay thuoc, nam thuoc, lam thuoc
vu khach » vu khanh, vay khach, cua khach
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
thu sach » tu sach, thuat sach, thuoc sach
vai cua » dai cua, hai cua, lai cua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
vu khac » vu kham, vu khanh, bui khac
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao

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 (vu khac))) or (thu sach)) ky tang xa 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 (vu khac))) OR (thu sach)) ky tang xa hoi. lieu va cam thuoc ban hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((vu khach) OR (vu khac))) or (thu sach)) ky tang xa hoi. lieu va cam thuoc ban hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((((vu khach) OR (vu khac))) or (thu sach)) ky tang xa hoi. lieu va cam thuoc ban hanh vai cua tre*.