Perhaps you should try some spelling variations:
associated vectors » associated receptors, associated pastors, associated operators
associated factors » associated bacteria
associated factor » associate factor, associated pastors, associated fatty
associated vector » associate director, associated secretory, associated infection
associate editor » associate editors, associate factor, 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 (((((associated vectors) OR (associated factor))) OR (associated factors))))) OR (associated vector))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((associate editor) or (((((associated vectors) OR (associated factor))) or (associated factors))))) or (associated vector))*".