Perhaps you should try some spelling variations:
"works macros working paper" » "works ratios working paper", "works mac working paper", "works machines working paper", "works macro working paper", "word macros working paper", "works across working paper", "works macros working papers"
"world manko working paper" » "world django working paper", "world manner working paper", "world manual working paper", "world many working paper", "world make working paper", "world mark working paper", "world manko working papers"
"world macro working paper" » "world mac working paper", "world avro working paper", "world across working paper", "word macro working paper", "world mark working paper", "world macro working papers"

Try widening your search to All Fields.

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: (((("world manko working paper") OR ("world macro working paper"))) OR ("works macros working paper")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"world manko working paper\") OR (\"world macro working paper\"))) or (\"works macros working paper\"))".
• Removing quotes may allow a broader search: (((( world manko working paper ) OR ( world macro working paper ))) or ( works macros working paper )).
• Adding a wildcard symbol may retrieve word variants: (((("world manko working paper") OR ("world macro working paper"))) or ("works macros working paper"))*.