Perhaps you should try some spelling variations:
associated vectors » associated receptors, associated pastors, associated factor
associated vector » associated secretory, associated infection, associated operators
associate editor » associate editors, associate factor, associated factor
bacteria » bacterial

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