Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
cao hoc » co hoc, cho hoc, chat hoc
y nang » ky nang, ly nang, v nang
qua ca » qua cac, qua cua, qua cai
ca xuc » cam xuc, chat xuc
va va » va van, va vai, va vat

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 y nang cao hoc. hieu qua ca xuc ((ban thanh) or (ban hanh)) ((va va) OR (va vua)) trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang cao hoc. hieu qua ca xuc ((ban thanh) OR (ban hanh)) ((va va) OR (va vua)) trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang cao hoc. hieu qua ca xuc ((ban thanh) or (ban hanh)) ((va va) OR (va vua)) trien".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang cao hoc. hieu qua ca xuc ((ban thanh) or (ban hanh)) ((va va) OR (va vua)) trien*.