Ivory Search with Multi Tier Filter Search

Hello there,

I’m managing a website for client in which one of the pages uses the Ivory Search: https://160.com.cy/index.php/locations/. The Ivory Search element is implemented on the top of the page.

Is there any documentation that you could provide or an example demo that could help me to do something like a multi tier filter search similar to what we can see in this page: https://hillsadvertising.com/billboard-advertising-outdoor-advertising-locations/
With the dropdown filters and the apply filter button included.

Thank you in advance,
Antonio

The page I need help with: [log in to see the link]