Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cac tuc » cac toc, cac tu, cac tac
van cac » van hac, van cau, van bac
bo sach » co sach, hoc sach
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
cua te » cua tu
x hoi » xa hoi, o hoi, 5 hoi

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) OR (bo sach)) v nang ((x hoi) OR (x ho)). hieu van cac tuc va danh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (bo sach)) v nang ((x hoi) or (x ho)). hieu van cac tuc va danh vi cua te*.