Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
qua ca » qua cac, qua cua, qua cai
ca loc » cua loc, chua loc
loc va » hoc va, luc va
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 (cac ky)) lang xa hoi. hieu qua ca loc va danh vi ve triet~.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (cac ky)) lang xa hoi. hieu qua ca loc va danh vi ve triet*.