Perhaps you should try some spelling variations:
associated factorss » associated factor, associated fractures, associate factor
associated factors » associated bacteria
associate editor » associate editors, associate factor, associate director

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((associate editor) OR (associated factorss))) OR (associated factors)).
• Adding a wildcard symbol may retrieve word variants: ((((associate editor) or (associated factorss))) or (associated factors))*.