Perhaps you should try some spelling variations:
ban thanh » ban hanh
ve triet » va trien, su triet
ban hang » ngan hang
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
ve ve » de ve, va ve, ke ve

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 ty ((nang xa) OR (sang ma)) hoi. hieu ve cam xuc ((ban thanh) OR (ban hang)) ve ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) or (sang ma)) hoi. hieu ve cam xuc ((ban thanh) OR (ban hang)) ve ve triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (sang ma)) hoi. hieu ve cam xuc ((ban thanh) OR (ban hang)) ve ve triet*.