2. The system of claim 1 , wherein: determining that a term of the original query meets an inaccuracy criterion comprises determining that the term is typographically incorrect; generating one or more derivative queries from the original query comprises generating a derivative query that includes only the terms of the original query that are not the potentially inaccurate term.
2. The system of claim 1 , wherein: determining that a term of the original query meets an inaccuracy criterion comprises determining that the term is typographically incorrect; generating one or more derivative queries from the original query comprises generating a derivative query that includes only the terms of the original query that are not the potentially inaccurate term. 6. The system of claim 2 , wherein determining a corrected term based on the identified resources comprises: generating candidate correction terms from terms that are included in the identified resources for a derivative query; determining, for each of the candidate correction terms, a similarity measure that measures the similarity of the candidate correction term to the potentially inaccurate term; and selecting as the corrected term the candidate correction term with a similarity measure that indicates a highest similarity relative to the other candidate correction terms.