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

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