An example system generates a search query for candidates, the search query comprising a set of parameters corresponding to attributes extracted from one or more stream-related information sources, each parameter in the set having a weight. Additionally, the system executes the query on member profiles of members of an online system to return search results based on the parameters and the weights of the parameters. Moreover, the system causes presentation of at least one search result from the search results, the at least one search result, being associated with at least one of the attributes. Furthermore, the system accesses feedback to the at least one search result that indicates a level of interest in the search result. Then, the system adjusts the parameters based on the feedback. Next, the system causes presentation of an updated search result, the updated search result being generated based on the adjusted set of parameters.