Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
hoa cua » hoa chat, hoa xuat
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
nang o » nang co, nang ho, nang ro
va cam » va cham, va cac, va cao
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang o hoi. hieu va cam duc ((ban thanh) OR (ban hanh)) hoa cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang o hoi. hieu va cam duc ((ban thanh) OR (ban hanh)) hoa cua te".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang o hoi. hieu va cam duc ((ban thanh) OR (ban hanh)) hoa cua te*.