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 brand working paper" » "world branch working paper", "world board working paper", "world beyond working paper", "word brand working paper", "world bank working paper", "world brand working papers"
"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", "world band working papers"

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 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 brand working paper\"))".
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• Adding a wildcard symbol may retrieve word variants: (((("world band working paper") OR ("world bandes working paper"))) or ("world brand working paper"))*.