Search. How does it work?
Try searching for ke sometime. You might be surprised at the results. It's all about character tokenization.
You might think you're clever by using punctuation in proper terms, but in reality they get treated like spaces. In this case ke-dollarsign-ha is really indexed as two terms ke ha. And you can put as many dollar signs, slashes or other characters in your query, they're just tokens to be ignored.
So for all the Korean Ke's out there here's a version of SNSDs Run Devil Run performed by the top search result for ke.
It's lame that punctuation is ignored.
Chris Hall, Dec 02 2011 on 1500wordmtu.com