| Term-specific smoothing for the language modeling approach to information retrieval: the importance of a query term Recent countries visiting this post |  |
 | 5 | United States |
 | 1 | |
 | 1 | Germany |
| Term-specific smoothing for the language modeling approach to information retrieval: the importance of a query term Recent countries visiting this post | |
| 5 | United States |
| 1 | |
| 1 | Germany |