Keyphrases
- short queries
- query expansion
- search engine
- retrieval effectiveness
- pseudo relevance feedback
- spoken document retrieval
- passage retrieval
- test collection
- relevance model
- search sessions
- language model
- retrieved documents
- structured queries
- information retrieval systems
- keywords
- information retrieval
- query terms
- web search engines
- co occurrence
- information seeking
- text classification
- probabilistic model
- image retrieval