Abstract: A computer-implemented method performed at a server system for enhancing search queries received from client devices. The method comprises maintaining a dataset mapping a co-appearance prevalence of at least two attribute values of each of a plurality of attributes of each of a plurality of product categories in a plurality search queries submitted to a search engine and during a single search thread, receiving at the server system a plurality of evolving search phrases from a search requestor at a client device that is distinct from the server system.

Abstract: A system and method including receiving from a user machine a text input inserted as search input into a search input interface, providing the user machine at least one search category suggestion obtained from hierarchic data structure of search categories, once a suggested search category is selected, adding an indication of the selected search category to the search input, and providing at least one additional search category suggestion by filtering suggested search categories according to previously selected search categories included in the search input.