Perhaps you should try some spelling variations:
communication concepts » communication circuits, communication congresses, communication channels
model dimensions » model dimension, moral dimensions, novel dimensions
concepts model » concepts models, concept model, concepts codes
scaled spaces » scale spaces, scaled space, scale space
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 model dimensions ((((scaled spaces) or (shared spaces))) or (tuple spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication concepts model dimensions ((((scaled spaces) OR (shared spaces))) OR (tuple spaces)).
• Adding a wildcard symbol may retrieve word variants: communication concepts model dimensions ((((scaled spaces) or (shared spaces))) or (tuple spaces))*.