Perhaps you should try some spelling variations:
oecd environment » oecd environmental, field environment, covid environment
wind environment » windows environment, grid environment, arid environment
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 environment) OR (wind environment)) working papers.
• Adding a wildcard symbol may retrieve word variants: ((oecd environment) or (wind environment)) working papers*.