Perhaps you should try some spelling variations:
communication concepts » communication circuits, communication congresses, communication channels
concepts styles » concept style, concepts skills, concepts series
sample spaces » sample space, sample speeches, sample sizes
shared spaces » shared space, shared stocks
tuple spaces » tuple space, type spaces, triple space

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

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