Perhaps you should try some spelling variations:
communication control » communication concepts, communication culture, communication channel
basics dimensions » basic dimensions, physics dimensions, based dimensions
regression link » regression line, regression lines, regression bias
control basics » control basic, control bisacsh, control asia

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

• If you are trying to use Boolean operators, they must be ALL CAPS: communication control basics dimensions ((regression link) OR (regression linear))~.
• Adding a wildcard symbol may retrieve word variants: communication control basics dimensions ((regression link) or (regression linear))*.