Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
cac suc » cao suc, cac nuoc, cac cuoc
suc van » su van, duc van, luc van
lai cua » lai chau, thai cua
hai cua » thai cua, hoi cua, hai quan
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho

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 v nang x hoi. hieu vien cac suc van hanh ((((lai cua) OR (hai cua))) OR (dai cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang x hoi. hieu vien cac suc van hanh ((((lai cua) OR (hai cua))) or (dai cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: su sach v nang x hoi. hieu vien cac suc van hanh ((((lai cua) OR (hai cua))) or (dai cua)) triet*.