You can now make a link to your custom Search Page in several ways.
Whether or not you use permalinks, you can link to your new Search Page by using Page ID number of the Page. Insert the next line into your any posts, pages or templates
<a href="index.php?page_id=17" title="Search Page">Search Page</a>
OR you may insert the next line into templates
<a href="<?php echo home_url(); ?>/?page_id=17">Search Page</a>
The Page slug is set in the Edit Page screen. It is the name of the page if you are using Permalinks. You can manually change this. An example of a Page slug link would be:
<a href="/wordpress/search-page/" title="Search Page">Search Page</a>
for any posts, pages or templates when slug is ‘search-page’. OR you may insert the next line into templates
<a href="<?php echo home_url(); ?>/wordpress/search-page/" title="Search Page">Search Page</a>
If you are using the wp_list_pages() template tag, the page name would be automatically generated in your Pages list.