I have been noticing Unknown search terms in the search term column of site stat for a couple of week. Clicking those terms take me to a link http://en.support.wordpress.com/stats/#search-engine-terms but it doesn't seem to have any clue about them. Is this an error or this is due to some WP policy. I'm much bothered as those terms are not included in total no. of visits yet they are well in number.
Any help please.
The blog I need help with is itspak.wordpress.com.