Exclude ONLY from search results?

[Jiří Fiala]

I have a folder with kids stuff that I just can't properly organize. I have this as a separate library, browsing just by file/folder structure is fine for this.

BUT how do I stop items from this folder to pollute search results? When I'm searching for "Grand", I want to find Grand Budapest Hotel, not all Peppa Pig episodes about her Grandfather

I remember seeing an option for this way back but I just cannot find it now. Any tips? Thanks!