Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
estates investment » estate investment, estate investments, rates investment
investment series » investment services, investment barriers, investment choices
real estates » real estate, weak states
net power » new power, non power, act power

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 power) OR (net power)) investment series ) or ( h. real estates investment treaties ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. ((kept power) OR (net power)) investment series ) OR ( h. real estates investment treaties )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. ((kept power) OR (net power)) investment series ) or ( h. real estates investment treaties ))".
• Adding a wildcard symbol may retrieve word variants: (( h. ((kept power) OR (net power)) investment series ) or ( h. real estates investment treaties ))*.