Perhaps you should try some spelling variations:
investment demand » investor demand
investment rates » investment rate
d investment » road investment, fund investment, good investment
kent rates » ascent rates, events rates
heat rates » heat rate, death rates, heat waves
heat d » heat _, heat 1, heat 5

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

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