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
cao duc » dao duc, cao suc, giao duc
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu van
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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