This should do the trick for you: https://duckduckgo.com/search_box
posted by x.15a2 Community Leader4 years and 3 months ago Link

Dear friend,
Thank you for your reply. This is very useful for me. But this is not work with search auto complete and I need to displays the results in one iframe. Is it possible?
posted by <hidden> • 4 years and 3 months ago Link
Because of the way we generate our search results, we do not have the syndication rights to allow you to host our results on your site (e.g. in a frame). When your users click on the results they will be instead taken to our site. Please see our partnerships page for more info on guidelines and getting in touch with us.
posted by TV 4 years and 3 months ago Link