Perhaps you should try some spelling variations:
communication concepts » communication circuits, communication congresses, communication channels
lower dimensional » low dimensional, one dimensional, four dimensional
concepts lower » concepts power, concepts life, concepts laue
scaled spaces » scaled space, scale space, staged spaces
shared spaces » shared space, shared stocks
scale spaces » scale space, sample spaces, tuple 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 lower dimensional ((((scaled spaces) or (shared spaces))) or (scale spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication concepts lower dimensional ((((scaled spaces) OR (shared spaces))) OR (scale spaces)).
• Adding a wildcard symbol may retrieve word variants: communication concepts lower dimensional ((((scaled spaces) or (shared spaces))) or (scale spaces))*.