1. A method comprising: analyzing, by a processor in a computer system, query logs to identify a pair of queries that are the same except that a first query, in the pair of queries, includes an extra term that is not included in a second query in the pair of queries; identifying, by a processor in the computer system, whether the pair of queries is associated with a quantity of search results that are common between the pair of queries; identifying, by a processor in the computer system, the extra term as a term that is not significant when the pair of queries is associated with at least a first threshold quantity of search results that are common between the pair of queries; processing, by a processor in the computer system, a query that includes the extra term to form a modified query when the extra term is identified as a term that is not significant; and identifying, by a processor in the computer system, search results based on the modified query when the extra term is identified as a term that is not significant.