Perhaps you should try some spelling variations:
investment services » government services, treatment services, investment choices
investment demand » investor demand
rates investment » notes investment, rules investment, water investment
rent based » rest based, event based, print based
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. ((rent based) OR (agent based)) investment services ) or ( h. kent rates investment demand ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. ((rent based) OR (agent based)) investment services ) OR ( h. kent rates investment demand )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. ((rent based) OR (agent based)) investment services ) or ( h. kent rates investment demand ))".
• Adding a wildcard symbol may retrieve word variants: (( h. ((rent based) OR (agent based)) investment services ) or ( h. kent rates investment demand ))*.