How to extract particular PO and Invoice Number from a multi paged pdf which contains more than two invoice in the same pdf

How to extract particular PO and Invoice Number from a multi paged pdf which contains more than two invoice in the same pdf. I used read pdf text activity and regex matching but I need to get the exact PO Number from the page where the invoice number is present

@Aswin_Sutheesh17

is it possible to share Pdf so that we can try as well if is not containing some sensitive data?

sorry i am not able to share the pdf
:neutral_face: