Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
qua cau » quan cau, qua cac, qua ca
cau loc » hau loc, cau hoc, cau luc
danh vi » dinh vi, danh di, danh va
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 lang) OR (ky tang)) xa hoi. hieu qua cau loc va ((danh vi) OR (hanh vi)) va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) OR (ky tang)) xa hoi. hieu qua cau loc va ((danh vi) or (hanh vi)) va triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) OR (ky tang)) xa hoi. hieu qua cau loc va ((danh vi) or (hanh vi)) va triet*.