Perhaps you should try some spelling variations:
ve triet » va trien
su triet » su viet, su tien
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
qua cau » quan cau, qua cac, qua ca
cau loc » hau loc, cau hoc, cau luc
va hanh » van hanh, va thanh, va danh
loc va » hoc va, luc va

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: su sach ky dang xa hoi. hieu qua cau loc va hanh vi ((ve triet) OR (su triet))~.
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xa hoi. hieu qua cau loc va hanh vi ((ve triet) or (su triet))*.