Perhaps you should try some spelling variations:
associate directors » associated vectors, associated receptors, associated factors
associated sectors » associated vectors, associated factors, associated vector
associate director » associated vector
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 (((associate directors) OR (associated sectors))))) OR (associate director)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((associate editor) or (((associate directors) OR (associated sectors))))) or (associate director))".
• Adding a wildcard symbol may retrieve word variants: ((((associate editor) or (((associate directors) OR (associated sectors))))) or (associate director))*.