Perhaps you should try some spelling variations:
communication connection » communications connections, communication connecting, communication collections
connection based » connections basis, connection brad, connection east
based dimension » based dispersion, basic dimensions, based extension
range spaces » gauge spaces, range states, large spaces
tuple spaces » tuple space, type spaces, triple space
large sparse » large scale

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication connection based dimension ((((range spaces) or (tuple spaces))) or (large sparse))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication connection based dimension ((((range spaces) OR (tuple spaces))) OR (large sparse)).
• Adding a wildcard symbol may retrieve word variants: communication connection based dimension ((((range spaces) or (tuple spaces))) or (large sparse))*.