החיפוש שביצעת - communications convention summary ((dimensioning databases) OR (dimensional database)) under - חזר ריק.

אולי כדאי לנסות איות אחר או כתיב מלא:
communications convention » communications connections, communication connection, communication conversation
dimensioning databases » dimensional databases, designing databases, dimensions database
dimensional database » dimensional databases, dimensions database, directional database
convention summary » convection summary, connection summary, correction summary

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