Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
van hoi » van hoa, van hoe, van loi
van hoc » van hoa
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ((van hoi) or (van hoc)). hieu van cam xuc va hanh vi ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((van hoi) OR (van hoc)). hieu van cam xuc va hanh vi ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((van hoi) or (van hoc)). hieu van cam xuc va hanh vi ((cua triet) OR (su triet))*".