Perhaps you should try some spelling variations:
investment period » investment series, investment policy, investment demand
based investment » fixed investment, best investment, related investment
investment costs » investment funds, investment flows, investment banks
bond investment » bond investments, road investment, fund investment
kent based » agent based, test based

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 bond investment period ) OR ( h. kent based investment costs ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. kent bond investment period ) or ( h. kent based investment costs ))*.