BuddyBoss

Let your members search through every BuddyPress component, along with pages and posts and custom post types of your choice, all in one unified search bar with a live dropdown of results.
Just activate the plugin, and every WordPress search input will instantly search your entire BuddyPress site, returning the results in a native tabbed interface right on your default Search Results template, automatically styled by BuddyPress to fit with your theme.
BuddyPress Global Search is built by the experienced developers at BuddyBoss who also offer premium <a href="https://www.buddyboss.com/themes/" title="BuddyPress themes from BuddyBoss" rel="nofollow ugc">BuddyPress themes</a> and <a href="https://www.buddyboss.com/plugins/" title="BuddyPress plugins from BuddyBoss" rel="nofollow ugc">plugins</a> to build your social network.

BuddyPress Global Search

Very nice. The Ajax search works. But, when I click on all results, it breaks my search results page. It must be the way my theme is set up. To be fair, this could be a rare problem that only a few people will experience. 

Neat, doesn't work

The plugin works great and does exactly what it says. 
I really appreciate that support agreed to my request of adding an apply_filter to their code that enables us to implement a customization we needed, thank you so much for that!

Great plugin & support

BuddyPress Global Search allows for a global, unified search of all BuddyPress components, with a live dropdown as you type.

BuddyPress Global Search vs ProfileGrid – User Profiles, Groups and Communities