Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
investment demand » investor demand
rates investment » notes investment, rules investment, water investment
current rates » current rate, current ratio, current water
heat ante » heat rate
heat act » health act

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. current rates investment treaties ) OR ( h. ((heat ante) OR (heat act)) investment demand ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. current rates investment treaties ) or ( h. ((heat ante) OR (heat act)) investment demand ))~".
• Adding a wildcard symbol may retrieve word variants: (( h. current rates investment treaties ) or ( h. ((heat ante) OR (heat act)) investment demand ))*.