Not able to fetch specific texts from the Scanned PDF using OCR

I am trying to scrape(extract) few specific text from one scanned PDF to csv, but facing too much of selectors issue. so using Tesseract and Microsoft OCR I am not able to archive it. I don’t know in my case every time those selectors value getting change in each run and throwing error, as my PDF is Scanned so selectors is picking complete frame.some please guide me here or help me with the resolution