Google is hiding the keywords to their link targets and Google Analytics is showing "not provided" for keyword data. Now you could get this data again by using the GoBackSearch.com technology.
A user who's bouncing back to the SERPs is a lost user. With GoBackSearch.com you could monetize this lost users and get an amount of the advertising revenues we generate with ads.
GoBackSearch.com is in closed beta, but you could send us a sign-up request to info@gobacksearch.com!