Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuat san » thuat toan, thuat song, thuat lanh
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
mai hoi » mai khoi, dai hoi, lai hoi
van cac » van hac, van cau, van bac
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
ma hoi » xa hoi, ma hoa, me hoi
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat san _ nang ((ma hoi) or (mai hoi)). hieu van cac nuoc va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san _ nang ((ma hoi) OR (mai hoi)). hieu van cac nuoc va hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: thuat san _ nang ((ma hoi) or (mai hoi)). hieu van cac nuoc va hanh di cua triet*.