Enter as much or as little information as you want. Search terms are separated by a space. Checking the box marked "include all search terms in query" will return results in which all the search terms in a given field are present. Leaving this box unchecked will return results in which any of the search terms are present. For example, entering "Popecki Galvin Moebius" in the search by author field and leaving the "Include all..." button unchecked will yield all papers and talks in which any author's name matches either Popecki, Galvin or Moebius. Performing the same search with the "Include all..." button checked will yield all papers and talks on which all three authors collaborated.