Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh sua » hinh su, hanh va, hanh tu
hieu ve » hieu va, hieu van
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
tuc va » thuc va, truc va, tuc xa
sua va » suat va, vua va, xua va
ve cac » va cac, vien cac

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) OR (nang ma)) hoi. hieu ve cac ((duc 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) OR (nang ma)) hoi. hieu ve cac ((duc 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) OR (nang ma)) hoi. hieu ve cac ((duc va) or (tuc va)) hanh sua va triet".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang xa) OR (nang ma)) hoi. hieu ve cac ((duc va) or (tuc va)) hanh sua va triet*.