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 vat, trung va
thuc va » thuc vat, thuc dan, thuc day
van cac » van hac, van cau, van bac
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua
cua te » cua tu

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 xa hoi. hieu van cac ((thuc va) OR (truc va)) danh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) v nang xa hoi. hieu van cac ((thuc va) or (truc va)) danh vi cua te*.