1. A computer-implemented method comprising: obtaining, at a search system, a token sequence for a resource, wherein each token in the token sequence comprises one or more characters; and selecting, at the search system, a token from the token sequence, wherein the selected token comprises at least one numeric portion having one or more contiguous numeric characters, and at least one non-numeric portion having one or more non-numeric characters; generating, at the search system, a new token corresponding to each of the at least one numeric portions of the selected token; and storing, in a search engine index, data associating the selected token and each of the new tokens corresponding to the at least one numeric portion of the selected token as index terms for the resource, wherein the search engine index is accessed to augment search queries.