Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach vu » sach va, sach tu, sach xu
sach uu » sach luu, sach tu, sach xu
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao duc, cao suc
xuc van » duc van, luc van, vuc van
su tien » su kien, su hien, tu tieng
va cao » va cac, va co, va dao
x hoi » xa hoi, o hoi, 5 hoi
kem » kiem

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: te ((sach vu) OR (sach uu)) nang ((x hoi) OR (x ho)). hieu va cao xuc van hanh kem su tien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach vu) OR (sach uu)) nang ((x hoi) or (x ho)). hieu va cao xuc van hanh kem su tien~".
• Adding a wildcard symbol may retrieve word variants: te ((sach vu) OR (sach uu)) nang ((x hoi) or (x ho)). hieu va cao xuc van hanh kem su tien*.