Perhaps you should try some spelling variations:
development strategies » development strategy
investment demands » investment demand, investment funds, investment trends
rates development » trades development, rate developments, cities development
rates investment » notes investment, rules investment, water investment
heat rates » heat rate, death rates, heat waves
kent rates » ascent rates, events rates

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

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