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
rent based » rest based, agent based, event based
kent rates » ascent rates, events rates
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. ((kent rates) OR (heat rates)) investment demand ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. rent based investment services ) or ( h. ((kent rates) OR (heat rates)) investment demand ))~".
• Adding a wildcard symbol may retrieve word variants: (( h. rent based investment services ) or ( h. ((kent rates) OR (heat rates)) investment demand ))*.