Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach va » sach xa, sach ha, sach dao
hanh ve » hanh vi, hanh va, hanh kem
xuc van » duc van, luc van, vuc van
cao xuc » cam xuc, cao duc, cao suc
hieu va » lieu va, hieu qua
va nang » van nang, da nang, cam nang
su tien » su kien, su hien, tu tieng
va cao » va cac, va co, va dao
o hai » co hai, so hai, o lai
o hoi » co hoi, o hoc, o hoa
ve su » va su

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