Perhaps you should try some spelling variations:
environmental working » environmental forcing, environmental sourcing, environmental loading
environments working » environments workshop, environments combining, environments building
working papers » working paper

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: (( oecd environmental working papers ) OR ( dead ((environments working) OR (environment working)) paper ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( oecd environmental working papers ) or ( dead ((environments working) OR (environment working)) paper ))*".