Perhaps you should try some spelling variations:
communications convection » communications convention, communications connections, communication connection
convection basic » conversation basic, convection mass, consumption basic
basic dimensions » based dimension, pacific dimensions, design dimensions
range spaces » gauge spaces, range states, large spaces
large space » large sparse, large scale, large surface
use spaces » tuple spaces, phase spaces, gauge spaces

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

• Performing a fuzzy search may retrieve terms with similar spellings: communications convection basic dimensions ((((range spaces) or (use spaces))) or (large space))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communications convection basic dimensions ((((range spaces) OR (use spaces))) OR (large space)).
• Adding a wildcard symbol may retrieve word variants: communications convection basic dimensions ((((range spaces) or (use spaces))) or (large space))*.