Perhaps you should try some spelling variations:
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
luc va » duc va, loc va
va cau » van cau, va cac, va dau
tuc va » thuc va, truc va, tuc xa
ve cua » le cua, de cua, ve cum
te cua » tue cua, le cua, de cua

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 _ lang xa hoi. hieu va cau ((luc va) OR (tuc va)) thanh ((ve cua) OR (te cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach _ lang xa hoi. hieu va cau ((luc va) or (tuc va)) thanh ((ve cua) OR (te cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: su sach _ lang xa hoi. hieu va cau ((luc va) or (tuc va)) thanh ((ve cua) OR (te cua)) triet*.