Perhaps you should try some spelling variations:
adjustment period » adjustment policy, adjustment operations
investment series » investment services, investment barriers, investment treaties
water investment » water investments, after investment, rates investment
melt water » salt water
kent based » event based, text based, set based

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. melt water investment series ) or ( h. ((kent based) OR (agent based)) adjustment period ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. melt water investment series ) OR ( h. ((kent based) OR (agent based)) adjustment period ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. melt water investment series ) or ( h. ((kent based) OR (agent based)) adjustment period ))*".