Perhaps you should try some spelling variations:
"motivational speaker" » "motivational speakers", "motivational states", "motivational scale"
"motivational state" » "motivational states", "amotivational state", "motivation state"
"motivation scale" » "motivational scale", "motivation state", "motivation scene"

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 state") OR ("motivation scale")))).
• Removing quotes may allow a broader search: (( motivational speaker ) or ((( motivational state ) or ( motivation scale )))).
• Adding a wildcard symbol may retrieve word variants: (("motivational speaker") or ((("motivational state") or ("motivation scale"))))*.