Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
mai khoi » mai khoa, tai khoa, cac khoi
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
ban hang » ngan hang
mai hoi » dai hoi, lai hoi, mai doi
duc ban » duc tan, duc van, dua ban
hang vi » hang va, hanh vi, hang di
ma hoi » xa hoi, ma hoa, me hoi
san ky » sang ky, van ky, dan ky
vi cua » vai cua, di cua
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang ((ma hoi) or (((mai hoi) OR (mai khoi)))). hieu van cham duc ban hang vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang ((ma hoi) OR (((mai hoi) OR (mai khoi)))). hieu van cham duc ban hang vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang ((ma hoi) or (((mai hoi) OR (mai khoi)))). hieu van cham duc ban hang vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang ((ma hoi) or (((mai hoi) OR (mai khoi)))). hieu van cham duc ban hang vi cua triet*.