To scrub outdated search results, first check who owns the site. If you control...

https://wiki-byte.win/index.php/My_404_page_says_%E2%80%98not_found%E2%80%99_but_Google_won%E2%80%99t_drop_it_-_what_am_I_missing%3F

To scrub outdated search results, first check who owns the site. If you control it, delete the page and ensure it returns a proper 404 status; don't let it become a "soft 404" that Google keeps crawling