3. The method of claim 1 , wherein identifying the clustered sets of suggested search queries comprises: processing a log of the search engine to obtain records related to previous search queries and click data; filtering and normalizing the obtained records; grouping the filtered and normalized records to generate one or more sets of suggested search queries; clustering the one or more sets of suggested search queries on the basis of at least one of a frequency, a click count, and a sponsored click count; and indexing the clustered sets of suggested search queries to generate the index of suggested search queries.
3. The method of claim 1 , wherein identifying the clustered sets of suggested search queries comprises: processing a log of the search engine to obtain records related to previous search queries and click data; filtering and normalizing the obtained records; grouping the filtered and normalized records to generate one or more sets of suggested search queries; clustering the one or more sets of suggested search queries on the basis of at least one of a frequency, a click count, and a sponsored click count; and indexing the clustered sets of suggested search queries to generate the index of suggested search queries. 4. The method of claim 3 , wherein the filtering and normalizing step comprises: processing the obtained records to remove records related to restricted content.