Generation and/or utilization of particular data structure(s) in more efficiently storing, retrieving, and/or presenting personal entry(s) is described herein. Implementations can utilize the data structure(s) in more efficiently responding to a vague user request that specifies a particular type of personal entry, but lacks any additional features of the personal entry(s) sought. Utilization of the data structure(s) can enable responsive personal entry(s) to be efficiently identified (e.g., processor and/or memory efficiency and/or with reduced latency). For example, some implementations can enable selection of a subgroup of personal entries to provide responsive to the vague request, without necessitating any processing of personal entries, that are not included in the selected subgroup, be performed responsive to the request. As another example, some implementations can additionally or alternatively obviate the need to perform any ranking of the available personal entries of the subgroup on the fly responsive to the request.