You can choose to change your viewing options as well as search for content. In the Files view, tap the menu (upper right corner) then select Filters or Search.
The Select Viewing Options screen has Sort, Order and Filter tabs. Use Sort to sort by name, type, size, and date modified. Use Order to list files by ascending and descending order. Use Filter to list only checked out files.
You can use Search from this menu to find a particular file or folder within the current view.