Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
ban hang » ngan hang
mai khoi » mai khoa, tai khoa, cac khoi
soc ban » hoc ban, coc ban, so ban
hang vi » hang va, hanh vi, hang di
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
san ky » sang ky, van ky, dan ky
ma hoi » mai hoi, xa hoi, ma hoa
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 khoi)). hieu ve cham soc ban hang vi ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang ((ma hoi) OR (mai khoi)). hieu ve cham soc ban hang vi ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang ((ma hoi) or (mai khoi)). hieu ve cham soc ban hang vi ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang ((ma hoi) or (mai khoi)). hieu ve cham soc ban hang vi ((cua triet) OR (cua viet))*.