Perhaps you should try some spelling variations:
field environment » food environment, world environment, wind environment
oecd environment » oecd environmental, world environment, covid environment
policy paper » policy part

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 (field environment))) OR (cloud environment)) policy paper.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((oecd environment) OR (field environment))) or (cloud environment)) policy paper".
• Adding a wildcard symbol may retrieve word variants: ((((oecd environment) OR (field environment))) or (cloud environment)) policy paper*.