Perhaps you should try some spelling variations:
government services » government securities
investment period » investment series, investment policy, adjustment period
rates investment » notes investment, rules investment, water investment
state government » e government
latent state » latent space, late stage, latent heat
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. heat rates investment period ) OR ( h. latent state government services ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. heat rates investment period ) or ( h. latent state government services ))*.