Perhaps you should try some spelling variations:
tu tieng » luc tieng, tu tuong, tu trong
van hanh » van thanh, ban hanh, van anh
sach vu » sach va, sach tu, sach uu
su tien » su kien, su hien, dau tien
hanh ve » hanh vi, hanh va, hanh kem
xuc van » duc van, luc van, vuc van
te sach » toc sach
hieu va » lieu va, hieu qua
vu nang » vuc nang, va nang, vu dang
cao xuc » cam xuc, cao duc, cao suc
va cao » va cac, va co, va dao
x hoi » xa hoi, o hoi, 5 hoi

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