Talvez debería tentar con algunhas variantes ortográficas:
communication cohesion » communication collections, communication control, communication cost
basics dimensions » basic dimensions, physics dimensions, based dimensions
cohesion basics » cohesion based, compression basics, combustion basics
psafe levels » safety levels, shade levels, price levels
wsafe levels » wage levels, safety levels, shade levels
safe levels » shade levels

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 cohesion basics dimensions ((safe levels) OR (((psafe levels) OR (wsafe levels))))~.
• Adding a wildcard symbol may retrieve word variants: communication cohesion basics dimensions ((safe levels) or (((psafe levels) or (wsafe levels))))*.