Perhaps you should try some spelling variations:
communication cohesion » communication collections, communication control, communication cost
databases limited » databases united, databases invited, databases linked
database limited » database optimized, database assisted, database oriented
two dimensional » three dimensional
cohesion two » cohesion _, cohesion a, cohesion eli

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 two dimensional ((databases limited) or (database limited))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication cohesion two dimensional ((databases limited) OR (database limited)).
• Adding a wildcard symbol may retrieve word variants: communication cohesion two dimensional ((databases limited) or (database limited))*.