Perhaps you should try some spelling variations:
investment projects » development projects
social investment » capital investment, initial investment
investment series » investment services, investment barriers, investment treaties
scale investment » estate investment, trade investment, estate investments
reported social » related social

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. likert scale investment projects ) or ( h. reported social investment series ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. likert scale investment projects ) OR ( h. reported social investment series )).
• Adding a wildcard symbol may retrieve word variants: (( h. likert scale investment projects ) or ( h. reported social investment series ))*.