Sometimes you have a need to find a particular email. You know it's in a specific Bundle and you know that you snoozed it for a future time or place. You can always just go into the Bundle and sift through all the emails in that bundle until you find it, or you can simply enter the search terms in:bundle is:snoozed.
But lets say you only knew that it was in a Bundle you created, as opposed to a system created label. Then just search has:userlabels is:snoozed
Or lets say you know its in a Bundle the system created. Then you can just search has:nouserlabels is:snoozed.
Simple as that. I know this was a brief tip, but I hope it was a helpful one for you.