Talvez debería tentar con algunhas variantes ortográficas:
communication affection » communication affecting, communicating affection, communication effective
communication cohesion » communication collections, communication control, communication cost
relational database » relational databases
database optimising » databases optimizing, data optimising, database optimized
all relational » full relational, xml relational, all rational

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) OR (communication affection)) all relational database optimising~.
• Adding a wildcard symbol may retrieve word variants: ((communication cohesion) or (communication affection)) all relational database optimising*.