Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
ve triet » va trien, su triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
toc van » hoc van, toc san, oc van
tac van » tac vang, cac van, tac va
x hoi » xa hoi, o hoi, x ho
vi ve » va ve, gi ve, ve ve

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: vu sach ky nang x hoi. hieu vien cac ((toc van) OR (tac van)) hanh vi ve triet~.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu vien cac ((toc van) or (tac van)) hanh vi ve triet*.