Splitting terms for constant_score

I think my use is a good candidate for the constant_score query—I'm trying to match searched to short (1-10) term product strings, where TF and IDF don't really matter. The Definitive guide on this subject recommends splitting the query into constant_score queries, but doesn't explain how to do this, if it's possible to do it automatically.

How do I get my search phrase to split into the individual constant_score queries?