Queries submitted by users when interacting with a network-based system may be analyzed by a query mining machine that determines a theme common to the submitted queries. The machine accesses the submitted queries and identifies a portion of the submitted queries as corresponding to the theme. Identification of the portion may include determining a strength score of a submitted query, where the strength score indicates a degree of influence that the submitted query is to have on the identifying of the portion. The machine generates a thematic query based on the identified portion and obtains search results by executing the thematic query. The search results correspond to a group of items. The machine presents at least some of the group of items as a collection that corresponds to the theme (e.g., within a temporary electronic storefront).