Perhaps you should try some spelling variations:
communication connected » communication collected, communication connecting, communication connection
components design » component design
sample spaces » sample space, sample speeches, sample sizes
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: communication connected components design ((type spaces) or (((sample spaces) or (whose spaces))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication connected components design ((type spaces) OR (((sample spaces) OR (whose spaces)))).
• Adding a wildcard symbol may retrieve word variants: communication connected components design ((type spaces) or (((sample spaces) or (whose spaces))))*.