Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
forest investment » foreign investment, direct investment, foreign investments
investment series » investment services, investment barriers, investment choices
based investment » fixed investment, best investment, bond investment
net forest » meet forest, wet forests

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

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