Exclude from search but not from search index!

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Hi everyone.

I am looking for an easy way to exclude certain subpages from the search function.
E. g.: The blog under example-website.de/blog and its articles shall not show up in the search results. However they should be found by search engines like google, so that "exclude from search index" is not an option.

Is there a simple way to accomplish that?

Best regards
M. Frey