9. The method of claim 2 , wherein the query context includes event information and the language model rules include event language model rules having an adjustment factor for adjusting a probability value of the base language model.
2. A method comprising: receiving a voice search query from a user device; determining a query context associated with the voice search query; determining, based on the query context, to apply one or more language model rules; dynamically adjusting one or more probabilities in a base language model according to the applied language model rules to generate a customized language model; using the customized language model to generate a text search query from the voice search query; and providing for display on the user device, one or more search results responsive to the text search query.