Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
van bac » van ban, van bao, van hac
bac tuc » bac tu, bach tuoc, bac thua
xa hanh » xa thanh, xa khanh, va hanh
vi cua » vai cua, di cua
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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 ky nang ((x ho) OR (o hoi)). hieu van bac tuc xa hanh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((x ho) or (o hoi)). hieu van bac tuc xa hanh vi cua te*.