Perhaps you should try some spelling variations:
"world hand working paper" » "world hard working paper", "world band working paper", "world chang working paper", "world hands working paper", "world hans working paper", "world had working paper"
"world hand working papers" » "world hard working papers", "world band working papers", "world chang working papers", "world hands working papers", "world hans working papers", "world had working papers"
"world bond working paper" » "world bonds working paper", "world band working paper", "world bold working paper", "world beyond working paper", "world board working paper", "world blind 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: (((("world hand working paper") OR ("world hand working papers"))) OR ("world bond working paper"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"world hand working paper\") OR (\"world hand working papers\"))) or (\"world bond working paper\"))*".
• Removing quotes may allow a broader search: (((( world hand working paper ) OR ( world hand working papers ))) or ( world bond working paper ))*.