The Search box on the navigation bar (see the picture below) allows you to type in text and find all the data (documents, datasets and maps) which has that text in the title.
Selecting the Filter button, displays a search form containing a wealth of options for customizing a search for various information on MapStand Hub. This search form allows for much more fine-tuned searches than the simple search box that is available at the top of every page.
Try to set some filter and see how the resulting data list changes accordingly. An interesting type of filter is EXTENT: you can apply a spatial filter by moving or zooming a map within a box as shown in the picture below.
Data can be sorted by Most recent, Less recent, Name and Popularity.