Perhaps you should try some spelling variations:
communication documentation » communication foundation, communication communication, communication conversation
documentation based » documentation fast, documentation a, documentation center
electronic modules » electronic module, electronic products, electronic modeling
based dimensions » based dimension, basic dimensions, based dimensioning
elevation models » elevation model, equation models, location models

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication documentation based dimensions ((elevation models) or (electronic modules))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication documentation based dimensions ((elevation models) OR (electronic modules)).
• Adding a wildcard symbol may retrieve word variants: communication documentation based dimensions ((elevation models) or (electronic modules))*.