Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
ve triet » va trien, su triet
thanh ve » hanh ve, thanh va, thanh vien
hieu van » hieu va, thien van, lieu va
xuc ban » duc ban, cuc ban, quoc ban
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va
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) OR (hieu van)) cam xuc ban thanh 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) OR (hieu van)) cam xuc ban thanh ve ve triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (sang ma)) hoi. ((hieu ve) OR (hieu van)) cam xuc ban thanh ve ve triet*.