Perhaps you should try some spelling variations:
"world bandes working paper" » "world banners working paper", "world ranges working paper", "world panes working paper", "world bank's working paper", "world aedes working paper", "world bandar working paper", "world bankes working paper", "world bondes working paper", "world handes working paper"
"world bandes working papers" » "world banners working papers", "world ranges working papers", "world panes working papers", "world bank's working papers", "world aedes working papers", "world bandar working papers", "world bankes working papers", "world bondes working papers", "world handes working papers"
"world brand working paper" » "world branch working paper", "world board working paper", "world beyond working paper", "word brand working paper", "world bank working paper"
"world band working paper" » "world board working paper", "world based working paper", "world hard working paper", "world bank working paper", "world bond working paper", "world hand working paper"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("world band working paper") OR ((("world bandes working paper") OR ("world bandes working papers"))))) OR ("world brand working paper")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"world band working paper\") or (((\"world bandes working paper\") OR (\"world bandes working papers\"))))) or (\"world brand working paper\"))".
• Removing quotes may allow a broader search: (((( world band working paper ) or ((( world bandes working paper ) OR ( world bandes working papers ))))) or ( world brand working paper )).
• Adding a wildcard symbol may retrieve word variants: (((("world band working paper") or ((("world bandes working paper") OR ("world bandes working papers"))))) or ("world brand working paper"))*.