Perhaps you should try some spelling variations:
communication control » communication concepts, communication culture, communication channel
course divisions » court decisions, course designs, forest divisions
control course » control coupled, control case, control costs
gauge spaces » large space, safe spaces
use spaces » tuple spaces, phase spaces, whose 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 control course divisions ((gauge spaces) or (use spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication control course divisions ((gauge spaces) OR (use spaces)).
• Adding a wildcard symbol may retrieve word variants: communication control course divisions ((gauge spaces) or (use spaces))*.