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