How to view search results on other page than index.php

Hello!

I would like to view my search results on other template page (for example on searchresults.php) and I have a question how to make it? I have readed the https://codex.www.ads-software.com/Creating_a_Search_Page#_Creating_a_Search_Page_Template
but this guide told me only how to make a search form.

OK. I have made my search page (https://something/searchpage) and I attribute my file searchpage.php to this page in WP. But the results are directed to index.php?s=search_keyword. So I want to make a simple page template like searchresults.php to view results from this address https://something/searchpage

So please anyone tell me how to do it???