Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
ban hanh » ban hang
va triet » va thiet, va trien, ve triet
thi van » thi lan, thi hanh, thi nang
van cau » van dau, van hau, van chat
cau luc » cau truc, cau phuc
luc ban » duc ban, cuc ban, luc bat
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
ma hoi » mai hoi, xa hoi, ma hoa
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky nang ((ma hoi) or (mai khoi)). thi van cau luc ban hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky nang ((ma hoi) OR (mai khoi)). thi van cau luc ban hanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: su xac ky nang ((ma hoi) or (mai khoi)). thi van cau luc ban hanh vi va triet*.