Search not working

i’m on a mac hight sierra. When I search in a Note containing multiple PDF’s, it searches only one PDF. But all the PDF’s are OCR before I imported them to the Note.
Did I do something to the PDF that’s searchable that I didn’t on the other non searchable PDF’s ?
Thank you.

Thank you, would you be able to upload some screenshots or videos describing it in detail? That way I can help you better.

Hi , it’s working now. I deleted all the PDF’s and re-imported.
Thank you.