Perhaps you should try some spelling variations:
communication concepts » communication circuits, communication congresses, communication channels
course dimensions » core dimensions, four dimensions, course divisions
concepts course » concepts sources, concepts closure, concepts case
sample spaces » sample space, sample speeches, sample sizes
large spaces » larger spaces, large space, gauge spaces
use spaces » tuple spaces, phase spaces, gauge 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 concepts course dimensions ((((large spaces) or (use spaces))) or (sample spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication concepts course dimensions ((((large spaces) OR (use spaces))) OR (sample spaces)).
• Adding a wildcard symbol may retrieve word variants: communication concepts course dimensions ((((large spaces) or (use spaces))) or (sample spaces))*.