Do you know? Google AdSense for Search program has a feature to show the top searches people performed on your site. To get hands on, log into your AdSense account, then head over to — AdSense ==> Reports ==> Advanced Reports ==> Choose product: AdSense for Search ==> Top queries data ==> Display report.
And if you look at the Google Analytics statistics of your blog, log into your Analytics account, then go to —All reports ==> Marketing Optimization ==> Search Engine Marketing ==> Keyword Considerations, you’ll see a different picture there, than the one above.
Source:Google BlogoscopedGoogle, AdSense, Analytics, Search Query, Result, Keywords