Perhaps you should try some spelling variations:
international rivers » international reserves, international review, international radar
international relief » international relations, international reserves
international rules » international rule, international rilem, international river

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: 2006 ((((international rules) OR (international rivers))) OR (international relief)) series.
• The words AND, OR and NOT may confuse the search; try adding quotes: "2006 ((((international rules) OR (international rivers))) or (international relief)) series".
• Adding a wildcard symbol may retrieve word variants: 2006 ((((international rules) OR (international rivers))) or (international relief)) series*.