In need of a SaaS solution for semantic thesaurus matching

I'm currently building a web application. In one of 开发者_高级运维it's key processes the application need to match short phrases to other similar ones available in the DB.

The application needs to be able to match the phrase:

Looking for a second hand car in good shape

To other phrases which basically have the same meaning but use different wording, such as:

2nd hand car in great condition needed

or

searching for a used car in optimal quality

The phrases are length limited (say 250 chars), user generated & unstructured.

I'm in need of a service / company / some solution which can help / do these connections for me.

Can anyone give any ideas?

Have you looked at SAS text miner? It may be suited to this kind of application. I have only seen a demo of it and it would be able to tokenize the data just fine. You may need some custom programming around the synonyms though.