Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
doanh dan » doanh ban, doanh van, doanh dao
tu sach » thu sach, su sach, te sach
tang ma » mang may, tang van
ve cham » va cham, ve chat, ve chim
vu cham » va cham, vu kham, tu cham
luc van » luoc van, luu van, duc van
dan cua » dan ca, ban cua, dai cua
cua tre » cua te, cuu tre, cua triet
y tang » ky tang, 6 tang, 7 tang
ma hoi » mai hoi, xa hoi, ma hoa

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 tang ma hoi. hieu ((ve cham) OR (vu cham)) luc van doanh dan cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach y tang ma hoi. hieu ((ve cham) or (vu cham)) luc van doanh dan cua tre*.