Perhaps you should try some spelling variations:
private investments » private investment, private investors
investment series » investment services, investment barriers, investment treaties
investments flows » investment flows, investment flow, investments laws
trade investment » private investment, estate investment, trade adjustment
likert private » direct private, limit private, delivery private
kept trade » net trade, best trade, nest trade

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

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