Keyphrases
- query expansion
- exploratory search
- search tasks
- retrieved documents
- test collection
- information retrieval
- language model
- information retrieval systems
- retrieval effectiveness
- information access
- relevant documents
- pseudo relevance feedback
- retrieval model
- relevance feedback
- information seeking
- data mining
- query terms
- web search
- probabilistic model
- retrieval systems
- document collections
- data sources