Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
thuc ban » thuoc ban, thuc dan, thu ban
cam thuc » am thuc, nam thuc, cam thu
vu khac » vu khanh, bui khac
nang xa » nang x, lang xa, nang ma
vu kham » vu khanh
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((vu khac) or (vu kham))) or (thuoc sach)) ky nang xa hoi. lieu va cam thuc ban thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((vu khac) OR (vu kham))) OR (thuoc sach)) ky nang xa hoi. lieu va cam thuc ban thanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((vu khac) or (vu kham))) or (thuoc sach)) ky nang xa hoi. lieu va cam thuc ban thanh di cua tre*.