Perhaps you should try some spelling variations:
ban thanh » ban hanh
cham cuu » cap cuu, chat cua
ban hang » ngan hang
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
co sach » bo sach, cuon sach, hoc sach
cua tre » cua te, cuu tre, cua triet

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) ty nang xa hoi. hieu va cham cuu ((ban thanh) OR (ban hang)) vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (co sach)) ty nang xa hoi. hieu va cham cuu ((ban thanh) OR (ban hang)) vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) ty nang xa hoi. hieu va cham cuu ((ban thanh) OR (ban hang)) vai cua tre*.