Perhaps you should try some spelling variations:
te sach » toc sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
hieu va » lieu va, hieu qua
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
hanh ve » hanh vi, hanh va, hanh kem
va cao » va cac, va co, va dao
x hoi » xa hoi, o hoi, 5 hoi
ve su » va su
kien » bien, vien, tien

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) OR (luc van)) hanh ve su kien~.
• 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) OR (luc van)) hanh ve su kien~".
• Adding a wildcard symbol may retrieve word variants: te sach vu nang ((x hoi) or (x ho)). hieu va cao ((xuc van) OR (luc van)) hanh ve su kien*.