Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » vu sach
danh vi » hanh vi, dinh vi, danh di
truc va » thuc va, thuc vat, trung va
van cac » van hac, van cau, van bac
so sach » so sanh, bo sach, co sach
v nang » va nang, vu nang, van nang
tuc va » thuc va, tuc xa, duc va
vi cua » vai cua, di cua
cua te » cua tu
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) OR (so sach)) v nang x hoi. hieu van cac ((tuc va) OR (truc va)) danh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) v nang x hoi. hieu van cac ((tuc va) or (truc va)) danh vi cua te*.