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

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