Perhaps you should try some spelling variations:
investment treaty » investment treaties, investment trusts, investment targets
investment series » investment services, investment barriers, investment treaties
green investment » foreign investment, direct investment, forest investment
based investment » fixed investment, best investment, bond investment
rent green » great green, rent great, run green

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

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