Keyphrases
- database
- query expansion
- query processing
- response time
- search queries
- keywords
- data structure
- user queries
- original query
- efficient processing
- query formulation
- complex queries
- database queries
- query terms
- retrieval systems
- keyword search
- user interaction
- retrieval method
- web search
- search result
- relevance feedback
- information systems
- information retrieval