Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
ban hang » ngan hang
cham duc » pham duc, cham soc, pham duy
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
mai hoi » mai khoi, dai hoi, lai hoi
duc ban » duc tan, duc van, dua ban
hang vi » hang va, hanh vi, hang di
sac ky » cac ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi
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 ban hang vi ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((ma hoi) OR (mai hoi)). hieu van cham duc ban hang vi ((cua triet) OR (su 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 ban hang vi ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) or (mai hoi)). hieu van cham duc ban hang vi ((cua triet) OR (su triet))*.