Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
investment demand » investor demand
water investment » water investments, after investment, rates investment
based investment » fixed investment, best investment, bond investment
current water » current rate, current rates, current state

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

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