Perhaps you should try some spelling variations:
"motivational speaker" » "motivational speakers", "motivational states", "motivational sparc"
"motivational social" » "motivation social", "motivational seminar", "motivational model"
"motivational scale" » "motivational case", "motivational state", "motivational states"
"motivation scale" » "motivation state", "motivation scene", "motivation soziale"

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 social"))) OR ("motivation scale")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"motivational speaker\") or (((((\"motivational scale\") OR (\"motivational social\"))) or (\"motivation scale\"))))".
• Removing quotes may allow a broader search: (( motivational speaker ) or ((((( motivational scale ) OR ( motivational social ))) or ( motivation scale )))).
• Adding a wildcard symbol may retrieve word variants: (("motivational speaker") or ((((("motivational scale") OR ("motivational social"))) or ("motivation scale"))))*.