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
truc va » thuc va, thuc vat, trung va
van bac » van ban, van bao, van hac
nang xa » nang x, lang xa, nang ma
co sach » bo sach, cuon sach, hoc sach
tuc va » thuc va, tuc xa, duc va
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 (co sach)) v nang xa hoi. hieu van bac ((tuc va) OR (truc va)) danh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) v nang xa hoi. hieu van bac ((tuc va) or (truc va)) danh vi cua te*.