Can't get Frontend Search to work
Inside of the &lt;form action="{{ url('search/results') }}"&gt; You define which page should be redirected to when the search form is submitted.

"search/results" would go to the search folder looking for the results.(html / twig). 

If you want to redirect to another page you should name the folder (which is "search" now) then the template name. This can be static without creating a "Single" for that page. 

If you did create a single that uses that template and you want to go through your single you can just put the slug of the created Single inside your form action.

Example:

You made a folder in craft/templates/ named: search, inside that folder you make a file named: results.

So the file structure would be craft/templates/search/results.twig and the form action would be: &lt;form action="{{ url('search/results') }}"&gt;

This way you can just use the preset search template the craft docs offer you. You could also change "results.twig/html" to index.html and then your form action wouldn't need the /results so your action would look like:
&lt;form action="{{ url('search') }}"&gt;

But I see you get redirect to /index.php/ aswell so I should try rmeoving that by changing your .htaccess file and maybe your general.php.

You can find instructions on how to do that here:
https://craftcms.com/support/remove-index.php