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

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