Perhaps you should try some spelling variations:
investment demand » investor demand
rates investment » notes investment, rules investment, water investment
investment rates » investment rate
gas investment » gross investment, best investment, d investment
kent rates » heat rates, ascent rates, events rates
heat gas » heat maps, heat gain, hot gas

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