Data mining software receives user query as input and user query and is segmented into multiple units. Then data mining software declines term and combines many features from those of unit use condition random field (CRF) type. Airtight petite person's feature is characterized in from least one of inquiry log from web document. Data mining software generates one or more candidate queries by addition word to the unit. Added term is a kind of to utilize mixed method inquiry session and web corpus. Data mining software also score is practical to the candidate query of each candidate query well-formedness, and correlation is to user query. So data mining software storage score candidate query is used for subsequence in the database and shows figure user's interface for searching engine.
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