Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
thu sach » tu sach, thuat sach, thuoc sach
thuc ban » thuoc ban, thuc dan, thu ban
vu khac » vu kham, vu khanh, bui khac
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai
vi cua » vai cua, di 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 (thu sach)) ky nang xa hoi. lieu ((va cam) OR (va cao)) thuc ban thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khac) OR (thu sach)) ky nang xa hoi. lieu ((va cam) OR (va cao)) thuc ban thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu khac) or (thu sach)) ky nang xa hoi. lieu ((va cam) OR (va cao)) thuc ban thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu khac) or (thu sach)) ky nang xa hoi. lieu ((va cam) OR (va cao)) thuc ban thanh vi cua tre*.