Perhaps you should try some spelling variations:
private investments » private investment, private investors
social investments » social investment, local investment, capital investments
investments series » investment series, investments serbia, investments sri
likert private » direct private, limit private, delivery private
likert social » likert scale, direct social, poker 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 social investments series ) or ( h. likert private investments series ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. likert social investments series ) OR ( h. likert private investments series )).
• Adding a wildcard symbol may retrieve word variants: (( h. likert social investments series ) or ( h. likert private investments series ))*.