Perhaps you should try some spelling variations:
investment period » investment series, investment policy, adjustment period
water investment » water investments, after investment, rates investment
investment ties » investment series, investment trends, investment trust
kent based » event based, text based, set based
kent water » ment water, kenya water, melt water

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 based) OR (agent based)) investment period ) OR ( h. kent water investment ties ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. ((kent based) OR (agent based)) investment period ) or ( h. kent water investment ties ))~".
• Adding a wildcard symbol may retrieve word variants: (( h. ((kent based) OR (agent based)) investment period ) or ( h. kent water investment ties ))*.