Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hang » ngan hang
cham duc » pham duc, pham duy, phan duc
hieu van » hieu va, thien van, lieu va
mai hoi » mai khoi, dai hoi, lai hoi
hang vi » hang va, hanh vi, hang di
sac ky » cac ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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 ky nang ((ma hoi) OR (mai hoi)). hieu van ((cham duc) OR (cham soc)) ban hang vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((ma hoi) OR (mai hoi)). hieu van ((cham duc) OR (cham soc)) ban hang vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) OR (mai hoi)). hieu van ((cham duc) OR (cham soc)) ban hang vi cua triet*.