Perhaps you should try some spelling variations:
van doanh » toan doanh, van thanh, van anh
van tham » van thanh, van tuan, van chat
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
y xang » ty xang
xang x » nang x
x hoi » xa hoi, o hoi, x ho
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. hieu ((va cham) OR (van tham)) cuu ((van doanh) OR (van dong)) d cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y xang x hoi. hieu ((va cham) or (van tham)) cuu ((van doanh) OR (van dong)) d cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y xang x hoi. hieu ((va cham) or (van tham)) cuu ((van doanh) OR (van dong)) d cua tre*.