Perhaps you should try some spelling variations:
ban hang » ngan hang
cham duc » pham duc, cham soc, pham duy
ca viet » va viet, co viet, hoa viet
hang vi » hang va, hanh vi, hang di
duc ban » duc tan, duc van, dua ban
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ma hoi » xa hoi, ma hoa, me hoi
tu san » thu san, tu ban, tu can
tu sac » tu sach, tu cac, tu bac
vi ca » vit ca, li ca, va ca

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

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