You already receive one Advance Search page when you install the theme. You don’t need to create another one. Just go to Pages – Edit Page and edit settings.

Permalinks must be set to custom starting v 1.08 in order for the “Search” button to redirect to Advanced Search Results page.

Starting v 1.11 you can set the Advanced search Results in Standard View or Half Map view:

Advanced Search Results Page – Standard Style

How to make Advanced Search Results Half Map style.