Perhaps you should try some spelling variations:
communications convention » communications connections, communication connection, communication conversation
dimensioning database » dimensional database, dimensional databases, dimensioning details
dimensions database » dimensional database, dimensional databases, decisions database
convention systems » conventional systems, conversion systems, connection systems

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

• Performing a fuzzy search may retrieve terms with similar spellings: communications convention systems ((dimensioning database) OR (dimensions database)) under~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "communications convention systems ((dimensioning database) OR (dimensions database)) under".
• Adding a wildcard symbol may retrieve word variants: communications convention systems ((dimensioning database) OR (dimensions database)) under*.