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

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 (associate director)))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((associate editor) or (((associate editors) or (((associated vector) OR (associate director))))))".
• Adding a wildcard symbol may retrieve word variants: ((associate editor) or (((associate editors) or (((associated vector) OR (associate director))))))*.