Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
thuc van » thuc vat, thuc dan, thuc va
cam thuc » am thuc, nam thuc, cam thu
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va, hieu qua
van cua » vang cua, ban cua, nan cua
dan cua » dan ca, ban cua, dai cua
co hoi » co hoc, co loi
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
va cam » va cham, va cac, va cao

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 ((y nang) OR (v nang)) co hoi. hieu va cam thuc van doanh ((van cua) OR (dan cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) OR (v nang)) co hoi. hieu va cam thuc van doanh ((van cua) or (dan cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) OR (v nang)) co hoi. hieu va cam thuc van doanh ((van cua) or (dan cua)) triet*.