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

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