1. A method comprising: storing, by a server computer, a global set of search suggestions; receiving, by the server computer over a network from a user computer operated by a user, one or more alphanumeric characters forming a portion of a search query; determining, by the server computer, a search suggestion to the portion of the search query from the global set of search suggestions based on a search history of the user, the search history of the user comprising a plurality of search queries entered by the user within a predetermined period of time; and transmitting, by the server computer to the user computer, the search suggestion for display by the user computer.