I do not know the precise keywords and there is a list, but you can check the Google Trends and Google Keyword Tool if you are familiar with them. They surely can help you determine what keywords are searches, their similar searches and how they perform overtime.
use google insights and search for some keywords like "travel" or "travel india". the result page shows the most searched keywords which includes your search term. then you can use the adword keyword tool and find out the cpc of the corresponding keyword.