In Notes in iOS 13 you can search for text inside your scanned documents. Search for any word, and Notes will find the document as well as the note you attached it to.
To learn more about this topic visit the following article:
Use Notes on your iPhone and iPod touch: https://apple.co/2mwqkXo
Contact Apple Support for iPhone: http://apple.co/iPhone
To subscribe to this channel: https://www.youtube.com/c/AppleSupport
To download the Apple Support app: http://apple.co/2hFtzIv
Apple Support on Twitter: https://twitter.com/AppleSupport