Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
vien da » vien dai, hien dai
suc van » su van, duc van, luc van
lai cua » hai cua, lai chau, thai cua
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
da suc » va suc, da su, da suu
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 da suc van hanh ((lai cua) OR (dai cua)) triet~.
• Adding a wildcard symbol may retrieve word variants: su sach v nang x hoi. hieu vien da suc van hanh ((lai cua) or (dai cua)) triet*.