Spotlight is a great way to locate something with just a swipe-down on your home screen. You can now get all of your notes on North right in Spotlight.
Swipe down on your iPhone or iPad home screen and type in your keywords to Spotlight.
Tap to open in North or touch and hold to preview
All notes are indexed periodically with your system. If you are reinstalling North anew, you may have to use North for a few minutes before it commences indexing your content with Spotlight.