Ocean10000 - 3:18 pm on Apr 20, 2009 (gmt 0)

Best that I can tell, they are trying to use these automated queries, which are all on the MSN Bot ranges, to improve their search engine results. My guess is that these queries do not go though as many filters as the production Search does. And are designed to show some indirect terms, which might not be on the page, but on pages referring to your page, or common in your nitch. They may also be designed to detect if you alter your page based on those search terms entered.

I know myself I just filter these out of my resulting Search terms and Referrer stats based on ip range. I ignore all search terms and referrers from known search engine bot ranges, so they do not skew my stats.