1. A method, comprising: receiving at least one search term from a user; automatically determining additional search terms related to the at least one search term at least in part by performing a probability calculation determining a relevance of the additional search terms to the at least one search term using a Simple Bayes probability model developed from analysis of at least one known document, wherein the analysis involves generating a plurality of overlapping vectors corresponding to a plurality of windows centered on a plurality of respective words of the at least one known document by counting a number of occurrences of the plurality of respective words within each window, wherein each respective word on which a window is centered is excluded from a vector generated corresponding to the window, and wherein the probability calculation is performed using at least one processor; and providing at least one of the additional search terms to the user.