Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thu san » thuy san, thu ban, phu san
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, va danh
san ky » sang ky, van ky, dan ky
ma hoi » xa hoi, ma hoa, me hoi
nam tu » nam thu, nam thuc
cua te » cua tu

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

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