Perhaps you should try some spelling variations:
ve triet » va trien, su triet
danh vi » hanh vi, dinh vi, danh di
sach ky » sach y, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
loc va » luc va
qua ca » qua cac, qua cua, qua cai
vi ve » va ve, gi ve, ve ve

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