Perhaps you should try some spelling variations:
communication concepts » communication circuits, communication congresses, communication channels
comment dimension » community dimension, content dimensions, component dimensions
concepts comment » concepts comments, concept comment, concepts common
tuple spaces » type spaces, triple space
gauge spaces » large space, safe spaces, use spaces
tuple space » people 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 comment dimension ((((tuple spaces) OR (tuple space))) or (gauge spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication concepts comment dimension ((((tuple spaces) OR (tuple space))) OR (gauge spaces)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "communication concepts comment dimension ((((tuple spaces) OR (tuple space))) or (gauge spaces))".
• Adding a wildcard symbol may retrieve word variants: communication concepts comment dimension ((((tuple spaces) OR (tuple space))) or (gauge spaces))*.