The refine search options, on the facets to the right of the results, allow us to:
Once we have selected one or more refine search options, they will appear at the top, under “Active filters”. To remove a selected filter, we should click on the “X” beside it, or select "Reset filters" to erase all of them.
Filters can also be locked selecting "Remember all filters", or one by one, using the padlock option beside. This way we can set a search pattern that will not restart every time we search for a new term.