Abstract: Techniques are disclosed for narrowing search requests, based on interaction between a search system and a user. For example, a plurality of search results is generated in response to a search query. To reduce the number of search results, a plurality of attributes or features of the search results are identified. Each feature has a corresponding plurality of clusters, where a cluster of a feature represents a corresponding range or value of the feature. For each feature, the first plurality of search results is categorized into the corresponding plurality of clusters of the corresponding feature. A feature is then selected. The search system interacts with the user, to identify a cluster of the plurality of clusters of the selected feature in which one or more intended search results belong. Based on such identification of the cluster, the search system refines or narrows down the first plurality of search results.