Perhaps you should try some spelling variations:
communications conclusion » communication conclusions, communications concluding, communities conclusion
dimensioning databases » dimensional databases, designing databases, dimensional database
directional database » dimensional database, dimensional databases, relational database
conclusion using » conclusion doing, conclusion making, conclusion moving

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

• Performing a fuzzy search may retrieve terms with similar spellings: communications conclusion using ((dimensioning databases) or (directional database)) under~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communications conclusion using ((dimensioning databases) OR (directional database)) under.
• Adding a wildcard symbol may retrieve word variants: communications conclusion using ((dimensioning databases) or (directional database)) under*.