Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
hanh sua » hinh su, hanh va, hanh tu
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
y nang » ky nang, ly nang, v nang
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
sua va » suat va, vua va, xua va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang xa hoi. ((hieu ve) OR (hieu van)) cam ((luc va) or (tuc va)) hanh sua va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. ((hieu ve) OR (hieu van)) cam ((luc va) OR (tuc va)) hanh sua va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. ((hieu ve) OR (hieu van)) cam ((luc va) or (tuc va)) hanh sua va triet".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. ((hieu ve) OR (hieu van)) cam ((luc va) or (tuc va)) hanh sua va triet*.