Perhaps you should try some spelling variations:
doanh van » doanh va, doanh ban, doanh nhan
va triet » va thiet, va trien, ve triet
doan van » doan va, hoang van, luan van
nang ha » nang hai, nang han, nang hoa
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac nuoc
cac tac » cac toc, cac bac, cac dac
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi

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 ha hoi. hieu ve ((cac tuc) or (cac tac)) vay ((doanh van) OR (doan van)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ha hoi. hieu ve ((cac tuc) OR (cac tac)) vay ((doanh van) OR (doan van)) va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang ha hoi. hieu ve ((cac tuc) or (cac tac)) vay ((doanh van) OR (doan van)) va triet*".