Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
van pham » san pham, van phan, van phat
hieu van » hieu va, thien van, lieu va
hanh di » hanh vi, hanh de, hang di
duc van » duc va, duc tan, duc manh
di cua » dai cua, doi cua, de cua
tu sac » tu sach, tu cac, tu bac
tu san » thu san, tu ban, tu can
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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 ((x hoi) or (o hoi)). hieu van pham duc van hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky nang ((x hoi) OR (o hoi)). hieu van pham duc van hanh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu san)) ky nang ((x hoi) or (o hoi)). hieu van pham duc van hanh di cua triet*".