Guys and Girls at Mircrosft has recently enabled a cool option to discover more about SEARCH INTENTIONS and PSYCHOMETRIC of online searchers.
Try this Apple Search here http://adlab.microsoft.com/Search-Funnels/:

Customers often perform searches by typing related keywords in specific sequences. You can use the adCenter search funnel tool to help visualize and analyze your customers’ search behaviors. For example, you can learn how many people search for BMW and then search for Mercedes Benz , Audi , and other automobiles. The previous Search Funnel demo used 22.9 thousands keywords; the updated version has about 4.3 million keywords (4.367.312).