Perhaps you should try some spelling variations:
investments period » investment period, investment periods, investments peru
water investments » term investments, sector investments
payment series » payment services, payments services, payment service
melt water » salt water
dept rate » deposit rate
heat rate » flat rate

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. melt water investments period ) OR ( h. ((dept rate) OR (heat rate)) payment series ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. melt water investments period ) or ( h. ((dept rate) OR (heat rate)) payment series ))~".
• Adding a wildcard symbol may retrieve word variants: (( h. melt water investments period ) or ( h. ((dept rate) OR (heat rate)) payment series ))*.