Perhaps you should try some spelling variations:
communication objective » communication collective, communication effective, communication object
objective methods » objectives methods, effective methods, operative methods
methods diffusion » networks diffusion, methods decision
whose spaces » phase spaces, shape spaces, whose race
type spaces » state spaces
use spaces » tuple spaces, phase spaces, gauge spaces

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

• If you are trying to use Boolean operators, they must be ALL CAPS: communication objective methods diffusion ((((whose spaces) OR (use spaces))) OR (type spaces))~.
• Adding a wildcard symbol may retrieve word variants: communication objective methods diffusion ((((whose spaces) or (use spaces))) or (type spaces))*.