Is there in Android an equivalent of the control + F search in texts and OCR PDF? In browser we have "find in page" options. But for PDF I didn't find such option. Is there shortcuts to make such search as we can make with the dashboard in PC?
Based on your comment that you often use Adobe Acrobat, the app offers the same process as Google's PDF viewer. When reading a document, you must click the magnifier.
You can then enter the word(s) you are looking for on the document.