Type the name of the episode, creator, user, list, or hashtag you're looking for into the white search bar at the top of the page. On the right side of the search bar, click "Everything." From the dropdown menu, select whether you want to search for creators, lists, episodes, users, or hashtags. Then hit your Enter key to start the search.
You can also toggle this setting from the Results page. Underneath Search Results, click the button of the category you chose to filter by or you can utilize the updated Filter function in the left side of the page. Search results should automatically update when you make your selection.