1. A system for providing searchable call indexes, comprising: one or more processors; and one or more memory devices storing instructions that, when executed by the one or more processors, perform operations comprising: receiving call information associated with each of a plurality of telephone conversations between callers and at least one vendor, the call information including at least one of an audio recording and a transcript associated with each telephone conversation; identifying one or more keywords from the call information associated with each telephone conversation; determining a frequency of the one or more keywords in the call information; indexing the call information associated with each telephone conversation into one or more indexes based on the identified one or more keywords and the frequency of the one or more keywords; receiving improvement data indicating one or more errors comprising a failure to identify one or more keywords in the audio recording, wherein the improvement data further comprises additional pronunciations of the one or more keywords; identifying one or more additional keywords based on the additional pronunciations; and determining search results from the one or more indexes responsive to a search query based on the one or more keywords and one or more additional keywords.