Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
vu khach » vu khanh, vay khach, cua khach
thuc ban » thuoc ban, thuc dan, thu ban
thu sach » tu sach, thuat sach, thuoc sach
cam thuc » am thuc, nam thuc, cam thu
vai cua » dai cua, hai cua, lai cua
nang xa » nang x, lang xa, nang ma
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 nang xa hoi. lieu va cam thuc ban thanh 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 nang xa hoi. lieu va cam thuc ban thanh 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 nang xa hoi. lieu va cam thuc ban thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((((vu khach) OR (vu khac))) or (thu sach)) ky nang xa hoi. lieu va cam thuc ban thanh vai cua tre*.