To find a class you need to know at least approximately the name of the class or the institution or the teacher of the class.

When a normal user looks for a class and there are too many, he should give a keyword to restrict the number of classes corresponding to this keyword. The server looks for classes for which the keyword is part of the name of (teacher + class + institution). Of course if almost all classes on your server belong to the same institution, giving the name of institution doesn't restrict the number enough.

If you are completely lost and are sure that the class exists, you may try with some quite common possible random substrings to get quite long lists of classes, and hope to endup with finding the right one.

Or write to the site manager, if he(she) is in a good mood.

Or just sit and begin to cry.

Eric