Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
thu sach » tu sach, thuat sach, thuoc sach
van doan » van toan, van hoan, van dan
ty hang » ly hang, ty xang, thi hang
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
vi cua » vai cua, di cua
cua te » cua tu
hang x » nang x, hoang xa, chang xu
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: thu sach ty hang x hoi. hieu ve ((tac tu) OR (cac du)) ((van doan) OR (van doanh)) vi cua te~.
• Adding a wildcard symbol may retrieve word variants: thu sach ty hang x hoi. hieu ve ((tac tu) or (cac du)) ((van doan) or (van doanh)) vi cua te*.