Perhaps you should try some spelling variations:
employment services » payment services
investments period » investment period, investment periods, investment series
term investments » term investment, _ investments
based employment » paid employment, age employment, related employment
kept based » test based, report based
kent » rent, kunt, went

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 term investments period ) or ( h. kept based employment services ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. kent term investments period ) OR ( h. kept based employment services )).
• Adding a wildcard symbol may retrieve word variants: (( h. kent term investments period ) or ( h. kept based employment services ))*.