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GabGirl - 2:41 pm on Feb 1, 2007 (gmt 0)
A person will convert those terms into a more natural language and optimize the page for "Drag Car Racing" instead of "Car Drag Racing"
The listing are still ordered by search volume. Possibly the alphabetical ordering of the actual term is is to make sure some where along the line there is a halfway bright human involved in the process.