If you need to hide pages from search results, start by adding a "noindex" tag...

https://kilo-wiki.win/index.php/Why_Does_Google_Keep_Showing_My_Listing_Even_When_I_Block_Crawling%3F

If you need to hide pages from search results, start by adding a "noindex" tag to the page header. This tells Google to drop the content from its index while keeping the page live for users