Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
va triet » va thiet, va trien, ve triet
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
ve cac » vien cac
vi va » vi van, vai va, vu 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 ty xang xa hoi. hieu ((ve cac) or (va cac)) xuc ((ban hanh) or (ban thanh)) vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty xang xa hoi. hieu ((ve cac) OR (va cac)) xuc ((ban hanh) OR (ban thanh)) vi va triet.
• Adding a wildcard symbol may retrieve word variants: so sach ty xang xa hoi. hieu ((ve cac) or (va cac)) xuc ((ban hanh) or (ban thanh)) vi va triet*.