Perhaps you should try some spelling variations:
communication cohesion » communication collections, communication control, communication cost
granule layer » granular layers, granite layers, granular laser
granite layer » granite layers, granite under
a extension » _ extension, 3 extension, 5 extension
cohesion a » cohesion _

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication cohesion a extension ((granule layer) or (granite layer))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication cohesion a extension ((granule layer) OR (granite layer)).
• Adding a wildcard symbol may retrieve word variants: communication cohesion a extension ((granule layer) or (granite layer))*.