Perhaps you should try some spelling variations:
"field environment working papers" » "food environment working papers", "world environment working papers", "lipid environment working papers"
"field environment working paper" » "food environment working paper", "world environment working paper", "lipid environment working paper"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"field environment working papers\") OR (\"field environment working paper\"))".
• Removing quotes may allow a broader search: (( field environment working papers ) OR ( field environment working paper )).
• Adding a wildcard symbol may retrieve word variants: (("field environment working papers") OR ("field environment working paper"))*.