Talvez debería tentar con algunhas variantes ortográficas:
communication concepts » communication circuits, communication congresses, communication channels
course divisions » court decisions, course designs, forest divisions
concepts course » concepts sources, concepts closure, concepts case
phase spaces » phase space, shape spaces, state spaces
scale spaces » scale space, sample spaces
tuple spaces » tuple space, type spaces, triple 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 concepts course divisions ((((phase spaces) or (scale spaces))) or (tuple spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication concepts course divisions ((((phase spaces) OR (scale spaces))) OR (tuple spaces)).
• Adding a wildcard symbol may retrieve word variants: communication concepts course divisions ((((phase spaces) or (scale spaces))) or (tuple spaces))*.