Perhaps you should try some spelling variations:
employment service » employment services
investment period » investment series, investment policy, adjustment period
based investment » fixed investment, best investment, bond investment
based employment » paid employment, related employment, casual employment
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. kent based investment period ) or ( h. kent based employment service ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. kent based investment period ) OR ( h. kent based employment service )).
• Adding a wildcard symbol may retrieve word variants: (( h. kent based investment period ) or ( h. kent based employment service ))*.