Can Copilot extract and concatenate all paragraphs containing given keyword?

I want to upload ebooks and papers to Copilot and ask it to extract and concatenate every paragraph containing strings I give it, eg "Battery pack".

I haven't been able to make it do this.

Right now Copilot 1) misses most occurences of simple keywords (missed 57/60) 2) tries to summarise instead of extracting verbatim text 3) doesn't understand the limits of a paragraph and when it does find an occurence correctly, it extracts most of the page.

Can anyone suggest how I can drive it better please?

Thanks.