Perhaps you should try some spelling variations:
investment services » government services, treatment services, investment choices
investment demand » investor demand
based investment » fixed investment, best investment, bond investment
rates investment » notes investment, rules investment, water investment
rent based » rest based, agent based, event based
heat rates » heat rate, death rates, heat waves

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. rent based investment services ) OR ( h. heat rates investment demand ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. rent based investment services ) or ( h. heat rates investment demand ))*.