Techniques for improving rankings of search results generated by a search engine are described. A set of member profiles is identified. The identifying is based on keywords specified in a search query matching search index entries corresponding to the set of member profiles. A subset of the member profiles is selected. The selecting is based on a matching of the keywords to special index entries associated with the subset of the member profiles. The special index entries represent values of data fields specified in each of the subset of the set of member profiles. The special index entries also represent relationships between the values of the data fields. Ranking scores associated with each of the subset of the member profiles are boosted. A portion of each of the set of member profiles is communicated for presentation in user interface in order of the ranking scores.