Perhaps you should try some spelling variations:
motivational speaker » motivational speakers, motivational states, motivational sparc
motivational system » motivational systems, motivation system
motivational scale » motivation scale, motivational case, motivational state

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: (((( motivational speaker ) OR ( motivational scale ))) OR ( motivational system )).
• Adding a wildcard symbol may retrieve word variants: (((( motivational speaker ) or ( motivational scale ))) or ( motivational system ))*.