Search for Sphinx, that’s what’s used here. Sphinx is selectable in ACP> General> Server configuration> Search settings> Sphinx Fulltext. But, it isn’t that straightforward, it requires some configuration from your end. For more information go to Sphinx.
Sadly, from my experience the Sphinx Open Source Search Server generally isn't available to those running on shared hosting plans as it is a server daemon.
Normal people… believe that if it ain’t broke, don’t fix it. Engineers believe that if it ain’t broke, it doesn’t have enough features yet. – Scott Adams