Perhaps you should try some spelling variations:
communities dimensions » communities extensions, communicative dimensions, community dimension
communication channel » communication channels, communication case, communication challenges
channel communities » planned communities, channel communications, channel communication
whose spaces » phase spaces, shape spaces, whose race
state spaces » state space
use spaces » tuple spaces, phase spaces, gauge spaces

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: communication channel communities dimensions ((((use spaces) or (whose spaces))) or (state spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication channel communities dimensions ((((use spaces) OR (whose spaces))) OR (state spaces)).
• Adding a wildcard symbol may retrieve word variants: communication channel communities dimensions ((((use spaces) or (whose spaces))) or (state spaces))*.