Perhaps you should try some spelling variations:
government services » government securities
investment period » investment series, investment policy, adjustment period
dated government » rates government, water government, faced government
based investment » fixed investment, best investment, bond investment
agent dated » agent based, agent data
kent based » agent based, event based, text based

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. agent dated government services ) or ( h. kent based investment period ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. agent dated government services ) OR ( h. kent based investment period )).
• Adding a wildcard symbol may retrieve word variants: (( h. agent dated government services ) or ( h. kent based investment period ))*.