Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh van, doanh nhan
va doanh » van doanh, vay doanh, va danh
hieu va » lieu va, hieu qua
nang ma » tang ma, nang cao, mang may
ban cua » ban quan
sang ma » tang ma, sang tao, mang may
hieu ve » hieu van
cao duc » dao duc, cao suc, giao duc
te sac » te sach, te cac, te san
cua te » cua tu
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((nang ma) or (sang ma)) hoi. ((hieu ve) OR (hieu va)) cao duc va doanh ban cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang ma) OR (sang ma)) hoi. ((hieu ve) OR (hieu va)) cao duc va doanh ban cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang ma) or (sang ma)) hoi. ((hieu ve) OR (hieu va)) cao duc va doanh ban cua te*".