Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh lam » thanh lap, hanh kem, hanh va
su triet » su viet, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
van hac » van hoc, van ha, van hai
xuc van » duc van, luc van, vuc van
su tien » su kien, su hien, tu tieng
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 sach ky nang x hoi. hieu ((van hac) or (van ban)) xuc van hanh lam ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ((van hac) OR (van ban)) xuc van hanh lam ((su triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu ((van hac) or (van ban)) xuc van hanh lam ((su triet) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ((van hac) or (van ban)) xuc van hanh lam ((su triet) OR (su tien))*.