Perhaps you should try some spelling variations:
communications circuits » communication circuits, communications concepts
concepts dimensions » concepts dimenstions, concept dimensions, concepts dimensional
circuits concepts » circuit concepts, circuits concept, circuits controls
tuple spaces » tuple space, triple space
gauge spaces » large space, safe spaces, use 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: communications circuits concepts dimensions ((((tuple spaces) or (type spaces))) or (gauge spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communications circuits concepts dimensions ((((tuple spaces) OR (type spaces))) OR (gauge spaces)).
• Adding a wildcard symbol may retrieve word variants: communications circuits concepts dimensions ((((tuple spaces) or (type spaces))) or (gauge spaces))*.