Search-engine software displays a group of search results in a graphical user interface (GUI) for a search engine. The search-engine software captures positive feedback and negative feedback as to the search results from a user. Then the search-engine software determines a collective aboutness signature for the search results associated with the positive feedback and a collective aboutness signature for search results associated with the negative feedback. The search-engine software obtains a score of similarity to each of the collective aboutness signatures for a representation of each query suggestion in a group of query suggestions. Then the search-engine software separates the scored query suggestions into two or more groups, based on the similarity scores, and displays query suggestions from the groups in the GUI.