Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, su triet, va triet
hieu ve » hieu va, hieu van
duc van » duc va, duc manh, duc phan
hanh di » hanh vi, hanh de, hang di
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
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) OR (duc tan)) hanh di cua 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) OR (duc tan)) hanh di cua 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) OR (duc tan)) hanh di cua triet*".