Perhaps you should try some spelling variations:
communication collection » communication collections, communication connection, communication collective
methods diffusion » networks diffusion, methods decision
gauge spaces » large space, safe spaces
type spaces » state spaces
use spaces » tuple spaces, phase spaces, whose spaces

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: communication collection methods diffusion ((((use spaces) OR (gauge spaces))) OR (type spaces))~.
• Adding a wildcard symbol may retrieve word variants: communication collection methods diffusion ((((use spaces) or (gauge spaces))) or (type spaces))*.