Perhaps you should try some spelling variations:
communication concepts » communication circuits, communication congresses, communication channels
empirical dimension » ethical dimension, spiritual dimension, political dimension
shared spaces » shared space, shared stocks
scale spaces » scale space, sample spaces, tuple spaces
type spaces » state 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 concepts empirical dimension ((((scale spaces) or (shared spaces))) or (type spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication concepts empirical dimension ((((scale spaces) OR (shared spaces))) OR (type spaces)).
• Adding a wildcard symbol may retrieve word variants: communication concepts empirical dimension ((((scale spaces) or (shared spaces))) or (type spaces))*.