Talvez debería tentar con algunhas variantes ortográficas:
communication concepts » communication circuits, communication congresses, communication channels
control extensions » central extensions, central extension, control extending
concepts control » concepts central, contexts control, conception control
larger spaces » larger species, large space, larger scale
range spaces » gauge spaces, range states, large 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 control extensions ((((range spaces) or (use spaces))) or (larger spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication concepts control extensions ((((range spaces) OR (use spaces))) OR (larger spaces)).
• Adding a wildcard symbol may retrieve word variants: communication concepts control extensions ((((range spaces) or (use spaces))) or (larger spaces))*.