Finding communities

I'm trying to find active communities on here. Problem is that when I search for something—or just scroll through the "explore" page—I'm finding a lot of communities that haven't been active for months.

The Explore page has a filter that allows me to filter for activity, but search results don't. It's a little demoralizing to click on interesting-sounding groups and keep noticing that no one uses them any more. Could there be some kind of option to not display anything that hasn't been used in X period of time?