Perhaps you should try some spelling variations:
van dinh » van minh, van dich, va dinh
su triet » su tien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
cac luc » cau luc, cac nuoc, cac cuoc
dinh vi » dinh ve, dinh viet, dinh tri
su viet » so viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang cao hoi. lieu va ((cac luc) OR (coc luc)) van dinh vi ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cao hoi. lieu va ((cac luc) OR (coc luc)) van dinh vi ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang cao hoi. lieu va ((cac luc) OR (coc luc)) van dinh vi ((su triet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cao hoi. lieu va ((cac luc) OR (coc luc)) van dinh vi ((su triet) or (su viet))*.