Perhaps you should try some spelling variations:
communities dimensions » communities extensions, communicative dimensions, community dimension
communication content » communication concepts, communication control, communication conflict
content communities » context communities, contexts communities, internet communities
tuple spaces » tuple space, triple space
type spaces » state spaces
safe spaces » state spaces, shape spaces, scale 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 content communities dimensions ((((tuple spaces) or (type spaces))) or (safe spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication content communities dimensions ((((tuple spaces) OR (type spaces))) OR (safe spaces)).
• Adding a wildcard symbol may retrieve word variants: communication content communities dimensions ((((tuple spaces) or (type spaces))) or (safe spaces))*.