1. A method of delivering a search result comprising: receiving a query; identifying a first term in the query that is a first portion of a first abbreviation pair, wherein the first abbreviation pair includes a second portion; identifying a second term in the query; identifying a topic corresponding to the second term; identifying that the first term in the query is also present in a second abbreviation pair as a third portion of the second abbreviation pair, wherein the second abbreviation pair includes a fourth portion and wherein the fourth portion of the second abbreviation pair is different from the second portion of the first abbreviation pair; revising the query by selectively including as additional parameters in the query, one of: (1) the second portion, (2) the fourth portion, or (3) both the second and fourth portions, wherein the fourth portion comprises a plurality of terms representing an acronym expansion of the third portion and wherein the selection is based at least in part on a topical score associated with each of the second portion and the fourth portion, respectively, the topical scores corresponding to relevance of the second and fourth portions to the topic and calculated according to both of relevance of a plurality of constituent terms of the second portion and the plurality of terms of the fourth portion to the topic and relevance of the combined constituent terms of the second portion and the plurality of terms of the fourth portion to the topic, respectively; locating one or more search results for the revised query; and returning the one or more search results.