Perhaps you should try some spelling variations:
communication education » community education, communication communication, communication information
communication cohesion » communication collections, communication control, communication cost
example extension » examples extensions, sample extension, simple extension
extension moment » extension movements, extension agent, extension model
moment spaces » movement spaces, document spaces, momentum space

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((communication cohesion) or (communication education)) example extension moment spaces~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((communication cohesion) OR (communication education)) example extension moment spaces.
• Adding a wildcard symbol may retrieve word variants: ((communication cohesion) or (communication education)) example extension moment spaces*.