Perhaps you should try some spelling variations:
associated secretory » associated factors, associated operators
associate editor » associate editors, associate director, associated vector
associate factor » associated factors, associated vector, 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 (((associate factor) OR (associated secretory)))).
• Adding a wildcard symbol may retrieve word variants: ((associate editor) or (((associate factor) or (associated secretory))))*.