Perhaps you should try some spelling variations:
communication validation » communications evaluation, communication application, communications navigation
validation methods » valuation methods, evaluation methods, visualization methods
methods session » methods section
tuple spaces » tuple space, triple space
shape spaces » shape space, shared spaces, state spaces
type spaces » state 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 validation methods session ((((tuple spaces) or (type spaces))) or (shape spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication validation methods session ((((tuple spaces) OR (type spaces))) OR (shape spaces)).
• Adding a wildcard symbol may retrieve word variants: communication validation methods session ((((tuple spaces) or (type spaces))) or (shape spaces))*.