Perhaps you should try some spelling variations:
communication collection » communication collections, communication connection, communication collective
methods diffusion » networks diffusion, methods decision
phase spaces » phase space, shape spaces, state spaces
gauge spaces » large space, safe spaces, use 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 collection methods diffusion ((((phase spaces) or (gauge spaces))) or (type spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication collection methods diffusion ((((phase spaces) OR (gauge spaces))) OR (type spaces)).
• Adding a wildcard symbol may retrieve word variants: communication collection methods diffusion ((((phase spaces) or (gauge spaces))) or (type spaces))*.