Perhaps you should try some spelling variations:
banh vai » hanh vi, ban va, hanh va
ban banh » ban hanh, ban anh, ban danh
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
cam cuc » cham cuu, pham cuc
vai cua » dai cua, hai cua, lai cua
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) OR (cam xuc)) ban banh 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) OR (cam xuc)) ban banh 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) OR (cam xuc)) ban banh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang xa hoi. hieu van ((cam cuc) OR (cam xuc)) ban banh vai cua tre*.