Perhaps you should try some spelling variations:
government services » government securities
direct government » district government, district governments
investment period » investment series, investment policy, adjustment period
rates investment » notes investment, rules investment, water investment
heat rates » heat rate, death rates, heat waves

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 period ) or ( h. kept direct government services ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. heat rates investment period ) OR ( h. kept direct government services )).
• Adding a wildcard symbol may retrieve word variants: (( h. heat rates investment period ) or ( h. kept direct government services ))*.