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
fixed investment » direct investment
run green » eu green, can green, n green

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. run green investment treaty ) OR ( h. agent fixed investment series ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. run green investment treaty ) or ( h. agent fixed investment series ))*.