Perhaps you should try some spelling variations:
employment services » payment services
investments period » investment period, investment periods, investments peru
term investments » term investment
based employment » paid employment, related employment, casual employment
kept based » depth based, text based, set based
kent term » kent cem, key term

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. 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 ))*.