In my session about improving your SharePoint search experiences that I presented at SPSBE and SPSParis, I discussed various tips and tricks to improve the search experience for a user. One of these tips was about visualizing other search keyword combinations. One of the problems users may experience is that they do not know which keywords to enter for their search queries.
Back in December 2013 I wrote an article in which I explained how you could dynamically switch the result source with a search query keyword. Note: You can find the article over here - Dynamically changing the result source in a SharePoint 2013 search center. The past few weeks I have got the same question a couple of times how to make it work for anonymous users.
By default search suggestions are enabled on the default search boxes in SharePoint 2013. Search Suggestions Server administrators are still able to manually add search suggestions via PowerShell, but the commands have been changed a little. Check out the following blog post how to do it in SharePoint 2010.
Since SharePoint 2013 introduced the display templates, branding elements has been made a lot easier. Like for instance when you want to brand the search box on your site. In the previous versions you mostly started the job by overriding the standard CSS of SharePoint. This approach will still work, but there is now an easier way.