Perhaps you should try some spelling variations:
communication concepts » communication circuits, communication congresses, communication channels
related dimensional » reduced dimensional, related intentional, reality dimensional
concepts related » concepts real
scale spaces » scale space, sample spaces
tuple spaces » tuple space, triple space
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 related dimensional ((scale spaces) or (((tuple spaces) or (type spaces))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication concepts related dimensional ((scale spaces) OR (((tuple spaces) OR (type spaces)))).
• Adding a wildcard symbol may retrieve word variants: communication concepts related dimensional ((scale spaces) or (((tuple spaces) or (type spaces))))*.