Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
forest investment » foreign investment, direct investment, foreign investments
investment period » investment series, investment policy, adjustment period
baker investment » water investment, water investments, better investment
rent forest » ant forest, meet forest, redd forest

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. (kent OR kept) baker investment treaties ) OR ( h. rent forest investment period ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. (kent OR kept) baker investment treaties ) or ( h. rent forest investment period ))~".
• Adding a wildcard symbol may retrieve word variants: (( h. (kent OR kept) baker investment treaties ) or ( h. rent forest investment period ))*.