1. A computerized method for providing one or more of relevant terms on the basis of which content items may be retrieved, the one or more relevant terms related to one or more terms or phrases comprising an exchange of electronic messages, the method comprising: retrieving, periodically during an exchange of one or more electronic messages, one or more terms or phrases used in the exchange of one or more electronic messages in which one or more users are participating; electronically providing one or more relevant terms associated with the one or more retrieved terms or phrases to the one or more users; receiving an indication of a user selection of the one or more relevant terms; and retrieving one or more content items responsive to a query associated with the selected one or more relevant terms.