Perhaps you should try some spelling variations:
class association » its association
press association » present association, preston association, present associations
glass association » grass association, class associations, gas association
computers class » computers classes, computers chess, computers case
computers press » computer press, computers process, computers chess
computer glass » computer flash, computer gas, computer classes

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: (((( computers class association ) OR ( computers press association ))) OR ( computer glass association )).
• Adding a wildcard symbol may retrieve word variants: (((( computers class association ) or ( computers press association ))) or ( computer glass association ))*.