Perhaps you should try some spelling variations:
investment period » investment policy, adjustment period, investment operations
investment series » investment services, investment barriers, investment treaties
fixed investment » direct investment
kent based » event based, text based, set based
kent fixed » net fixed

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) OR (agent based)) investment period ) or ( h. kent fixed investment series ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. ((kent based) OR (agent based)) investment period ) OR ( h. kent fixed investment series )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. ((kent based) OR (agent based)) investment period ) or ( h. kent fixed investment series ))".
• Adding a wildcard symbol may retrieve word variants: (( h. ((kent based) OR (agent based)) investment period ) or ( h. kent fixed investment series ))*.