Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
va dam » van dam, va dao, va dau
dam tu » nam tu, cam tu, tam tu
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky tang ma hoa. hieu va dam tu ((ban thanh) or (ban hanh)) ((vi cua) OR (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky tang ma hoa. hieu va dam tu ((ban thanh) OR (ban hanh)) ((vi cua) OR (di cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky tang ma hoa. hieu va dam tu ((ban thanh) or (ban hanh)) ((vi cua) OR (di cua)) triet*".