Perhaps you should try some spelling variations:
investment demand » investor demand
rates investment » notes investment, rules investment, water investment
investment rates » investment rate
rent rates » heat rates, rent taxes, current rates
kent based » event based, text based, set based

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. rent rates investment rates ) or ( h. ((kent based) OR (agent based)) investment demand ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. rent rates investment rates ) OR ( h. ((kent based) OR (agent based)) investment demand )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. rent rates investment rates ) or ( h. ((kent based) OR (agent based)) investment demand ))".
• Adding a wildcard symbol may retrieve word variants: (( h. rent rates investment rates ) or ( h. ((kent based) OR (agent based)) investment demand ))*.