Perhaps you should try some spelling variations:
ban danh » ban doanh, ban hanh, ban dan
ban banh » ban hanh, ban anh, ban thanh
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
vai cua » dai cua, hai cua, lai cua
van cam » van nam, van lam, van cau
cam cuc » cam xuc, cham cuu, pham cuc
nang xa » nang x, lang xa, nang ma
te sach » toc sach
cua tre » cua te, cuu tre, cua triet

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

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