1. A computer-implemented method for accessing content items in a content store comprising: maintaining a text index of content items in a content store to enable a keyword search on the content items; receiving a query having a keyword and generating a hit list from the text index using the keyword, the hit list comprising one or more content items of the content store; extracting frequent phrases from text within content items of the hit list; assigning a relative relevance to the frequent phrases wherein frequent phrases having a relatively high relevance are relevant phrases; and grouping content items into topics based on presence of relevant phrases within the content items of the hit list.