Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
danh di » danh du, xanh di, danh dien
danh vi » hanh vi, dinh vi, danh va
cau hoc » cau hoi, cau hoa, cao hoc
su sach » vu sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sach » so sanh, bo sach, co sach
qua cau » quan cau, qua cac, qua ca

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) OR (so sach)) ky lang xa hoi. hieu qua cau hoc va ((danh vi) OR (danh di)) va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky lang xa hoi. hieu qua cau hoc va ((danh vi) OR (danh di)) va triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky lang xa hoi. hieu qua cau hoc va ((danh vi) OR (danh di)) va triet*.