Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
thu sach » tu sach, thuat sach, thuoc sach
thuc ban » thuoc ban, thuc dan, thu ban
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vay khach) or (thu sach)) ky nang xa hoi. lieu ((va cam) OR (va cao)) thuc ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vay khach) OR (thu sach)) ky nang xa hoi. lieu ((va cam) OR (va cao)) thuc ban thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vay khach) or (thu sach)) ky nang xa hoi. lieu ((va cam) OR (va cao)) thuc ban thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vay khach) or (thu sach)) ky nang xa hoi. lieu ((va cam) OR (va cao)) thuc ban thanh vai cua tre*.