Perhaps you should try some spelling variations:
investment demand » investor demand
rates investment » notes investment, rules investment, water investment
debt investment » direct investment, direct investments, forest investment
gas investment » gross investment, best investment, d investment
kent rates » heat rates, ascent rates, events rates

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) or (debt 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) OR (debt investment)) rates ) OR ( h. kent rates investment demand )).
• Adding a wildcard symbol may retrieve word variants: (( h. heat ((gas investment) or (debt investment)) rates ) or ( h. kent rates investment demand ))*.