Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va doanh » van doanh, vay doanh, va danh
nang co » nang cao, nang doc, nang noi
hieu va » lieu va
thuc va » thuc vat, thuc dan, thuc day
ban cua » ban quan
dan cua » dan ca, dai cua, day cua
y nang » ky nang, ly nang, v nang
co hoi » co hoc, co loi

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