Perhaps you should try some spelling variations:
ve triet » va trien, su triet
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
cau luc » cau truc, cau phuc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cau tuc » cau truc, cau tu, cau phuc
nang xa » nang x, lang xa, nang ma

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van ((cau tuc) OR (cau luc)) van hanh kem ((cua viet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu van ((cau tuc) OR (cau luc)) van hanh kem ((cua viet) or (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van ((cau tuc) OR (cau luc)) van hanh kem ((cua viet) or (ve triet))*.