Perhaps you should try some spelling variations:
va doanh » van doanh, vay doanh, va danh
ve triet » va trien, su triet
nang ho » nang hoc, nang co, tang ho
hieu ve » hieu va, hieu van
cam tuc » cam tu, nam thuc, dam thuc
sac ky » sai ky
ho hoi » hoc hoi, hoa hoi, hoi hoi
tai ve » tai va, tai he, tai le

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) or (cac ky)) nang ho hoi. hieu ve ((cam tuc) OR (cam xuc)) va doanh tai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (cac ky)) nang ho hoi. hieu ve ((cam tuc) OR (cam xuc)) va doanh tai ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) or (cac ky)) nang ho hoi. hieu ve ((cam tuc) OR (cam xuc)) va doanh tai ve triet*".