Perhaps you should try some spelling variations:
investment demand » investor demand
rates investment » notes investment, rules investment, water investment
investment rate » investment climate
bond investment » bond investments, road investment, fund investment
heat rates » heat rate, death rates, heat waves
test bond » test bed, test book, tests beyond

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