Perhaps you should try some spelling variations:
ban thanh » ban hang
nang van » dang van, tang van, lang van
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » hieu qua
cam luc » cam xuc, cau luc
cuc tre » duc tre, cua tre, cuu tre

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 ky nang van hoa. ((hieu va) or (lieu va)) cam luc ((ban thanh) OR (ban hanh)) tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang van hoa. ((hieu va) OR (lieu va)) cam luc ((ban thanh) OR (ban hanh)) tai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang van hoa. ((hieu va) or (lieu va)) cam luc ((ban thanh) OR (ban hanh)) tai cuc tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang van hoa. ((hieu va) or (lieu va)) cam luc ((ban thanh) OR (ban hanh)) tai cuc tre*.