Perhaps you should try some spelling variations:
associated vectors » associated factors, associated receptors, associated factor
associated pastors » associated factors, associated pairs, associated operators
associated vector » associated factors, associate director, associated secretory
associate factor » associated factors, associate director, associate editors

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: ((((associated vector) OR (((associated vectors) OR (associated pastors))))) OR (associate factor)).
• Adding a wildcard symbol may retrieve word variants: ((((associated vector) or (((associated vectors) or (associated pastors))))) or (associate factor))*.