Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
thuc ban » thuoc ban, thu ban, thuc van
hanh vai » hanh vi, hanh va, hanh tai
thuc dan » thuc hanh, hoc dan, thuc vat
nang xa » nang x, lang xa, nang ma
tu sach » thu sach, su sach, te 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

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 (tu sach)) ky nang xa hoi. lieu va cam ((thuc ban) or (thuc dan)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (tu sach)) ky nang xa hoi. lieu va cam ((thuc ban) OR (thuc dan)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (tu sach)) ky nang xa hoi. lieu va cam ((thuc ban) or (thuc dan)) hanh vai cua tre*.