Perhaps you should try some spelling variations:
communication case » communication channels, communication culture
diffusion limit » diffusion limited, diffusive limit, diffusion finite
bi dimensional » _ dimensional, 3 dimensional, 2 dimensional
diffusion lima » diffusion like, diffusion linear, diffusion flame
a dimensional » _ dimensional, 3 dimensional, 2 dimensional

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication case ((a dimensional) or (bi dimensional)) ((diffusion lima) or (diffusion limit))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication case ((a dimensional) OR (bi dimensional)) ((diffusion lima) OR (diffusion limit)).
• Adding a wildcard symbol may retrieve word variants: communication case ((a dimensional) or (bi dimensional)) ((diffusion lima) or (diffusion limit))*.