Perhaps you should try some spelling variations:
communication circuit » communication circuits, communications circuits, communication current
concepts dimensional » concept dimensions, conveyor dimensional, concepts professional
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: communication circuit concepts dimensional ((((tuple spaces) OR (type spaces))) OR (gauge spaces))~.
• Adding a wildcard symbol may retrieve word variants: communication circuit concepts dimensional ((((tuple spaces) or (type spaces))) or (gauge spaces))*.