1. A system comprising: a processor and executable instructions accessible on a computer-readable medium that, when executed, cause the processor to perform operations comprising: receive, from a first user, a search query to search for document information in a database, the database including an index data structure; determine that terms of the search query are in accordance with dictionary information that corresponds to the first user, the dictionary information for the first user including a first list of compatible query operators; apply the search query to the index data structure in the database to identify the document information; and send an electronic interface to the first user, the electronic interface including the document information.