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

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