Perhaps you should try some spelling variations:
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, tu cach
nang co » nang cao, nang doc, nang noi
te sach » toc sach
hieu va » lieu va, hieu qua
co hoi » co hoc, co loi
va am » va lam, va cam

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) OR (te sach)) ky nang co hoi. hieu va am thuc va dinh ((vai cua) OR (hai cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang co hoi. hieu va am thuc va dinh ((vai cua) or (hai cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang co hoi. hieu va am thuc va dinh ((vai cua) or (hai cua)) triet*.