What a great idea—I’m sure others will agree that this would be nice to have too!
If this is important to you, please submit this suggestion to the Idea exchange, under App Improvement Ideas. However, do search for a similar request first (and also upvote), just in case it has already been suggested to avoid duplicates.
In the meantime, a workaround would be to create a filter that matches the exact name of the tag you are searching for.
You can also learn more about filtering in these Make Academy units: