Perhaps you should try some spelling variations:
associated factors » associated bacteria
associated factor » associated pastors, associated vectors, associated fatty
associated vector » associate director, associated secretory, associated infection
associate editor » associate editors, associate director, associated motor
associate factor » associate director, associate editors, associated fatty

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 factor))) OR (((associated vector) OR (associated factors))))) OR (associate factor)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((associate editor) OR (associated factor))) or (((associated vector) or (associated factors))))) or (associate factor))".
• Adding a wildcard symbol may retrieve word variants: ((((((associate editor) OR (associated factor))) or (((associated vector) or (associated factors))))) or (associate factor))*.