Perhaps you should try some spelling variations:
investment demands » investment demand, investment funds, investment trends
rates investment » notes investment, rules investment, water investment
investment flows » investment funds
heat rates » heat rate, death rates, heat waves
kent based » agent based, event based, set based

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. heat rates investment flows ) OR ( h. ((kent based) OR (text based)) investment demands ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. heat rates investment flows ) or ( h. ((kent based) OR (text based)) investment demands ))~".
• Adding a wildcard symbol may retrieve word variants: (( h. heat rates investment flows ) or ( h. ((kent based) OR (text based)) investment demands ))*.