Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
doanh d » doanh _, doanh dao, doanh va
va tham » van tham, va cham, va thuat
cua tre » cua te, cuu tre, cua triet
y xang » ty xang
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi
d cua » de cua, do cua, da cua

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: tu sach y xang ((x hoi) OR (o hoi)). hieu ((va tham) OR (va thanh)) cuu van doanh d cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y xang ((x hoi) OR (o hoi)). hieu ((va tham) or (va thanh)) cuu van doanh d cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y xang ((x hoi) OR (o hoi)). hieu ((va tham) or (va thanh)) cuu van doanh d cua tre*.