I'd look into using a [full-text index][1] for this query. If you have the server power to keep that index up-to-date, performance would be much faster than the %something% search for the reason @DaniSQL brought up. Rebuilding the index can be pretty slow, but it might be worth giving this a try.
[1]: http://msdn.microsoft.com/en-us/library/ms142571.aspx
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