Perhaps you should try some spelling variations:
communications circuits » communication circuits, communications concepts
elements dimensions » equipment dimensions
circuits elements » circuit elements, circuit element, circuits experiments
tuple spaces » tuple space, triple space
whose spaces » phase spaces, shape spaces, whose race
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 elements dimensions ((((tuple spaces) or (type spaces))) or (whose spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communications circuits elements dimensions ((((tuple spaces) OR (type spaces))) OR (whose spaces)).
• Adding a wildcard symbol may retrieve word variants: communications circuits elements dimensions ((((tuple spaces) or (type spaces))) or (whose spaces))*.