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, te sach
lam xuc » cam xuc, lam duoc
vai cua » dai cua, hai cua, lai cua
van lam » van nam
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
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 ((ty nang) OR (ty hang)) xa hoi. hieu van lam xuc ((ban banh) or (ban danh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu van lam xuc ((ban banh) OR (ban danh)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty hang)) xa hoi. hieu van lam xuc ((ban banh) or (ban danh)) vai cua tre*".