Making a minimum page length.

When I look at my search results I’d like to see a minimum page length. If the number of entries are three or more than that it’s fine to have the length longer than the minimum. See https://test.efreebn-sermons.org/blog/category/events/women_events/

When they don’t find anything I can force then length to be a certain length because the text is the same: See https://test.efreebn-sermons.org/blog/category/events/everyone/

But when I only have one or two entries the page is too short. But since the number and size of the entries change I don’t know how to make the page the minimum length: See https://test.efreebn-sermons.org/blog/category/events/kids_events/