Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
lang van » tang van, hoang van, giang van
dang van » hoang van, hang va
lang xa » lang ha, dang xay
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
so sach » so sanh, bo sach, co sach
ve cac » va cac, vien cac
cac tu » cac thu, cach tu, cac du
vi su » va su, ve su, ki su

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: so sach ky ((lang xa) OR (((lang van) OR (dang van)))) hoi. hieu ve cac tu va hanh vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((lang xa) or (((lang van) OR (dang van)))) hoi. hieu ve cac tu va hanh vi su triet~".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((lang xa) or (((lang van) OR (dang van)))) hoi. hieu ve cac tu va hanh vi su triet*.