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

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 (((associate director) OR (associated vector))))) OR (associate editors)).
• Adding a wildcard symbol may retrieve word variants: ((((associate editor) or (((associate director) or (associated vector))))) or (associate editors))*.