Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thien van » thi van
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
hanh di » hanh vi, hanh de, hang di
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang x hoi. ((hieu ve) or (thien van)) pham duc van hanh di ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang x hoi. ((hieu ve) OR (thien van)) pham duc van hanh di ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang x hoi. ((hieu ve) or (thien van)) pham duc van hanh di ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang x hoi. ((hieu ve) or (thien van)) pham duc van hanh di ((cua triet) OR (su triet))*.