Perhaps you should try some spelling variations:
social investment » capital investment, initial investment
investment series » investment services, investment barriers, investment treaties
investment demand » investor demand
baker investment » water investment, water investments, better investment
likert social » likert scale, direct social, poker social
kent » rent, kunt, kept

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: (( h. likert social investment series ) OR ( h. kent baker investment demand ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. likert social investment series ) or ( h. kent baker investment demand ))*.