Use the or operator to find objects that contain certain words but not necessarily all the words in your criteria. When you use or in the search criteria, objects with any of the terms that you entered return. For example, if you enter the search criteria Author or Publish or Manage, objects containing any of these words return.
Using or widens your search. The more terms that you add to the search criteria, the less restrictive the search becomes, so the number of results is higher.