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

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