Perhaps you should try some spelling variations:
"world banks technical paper" » "world tasks technical paper", "world basics technical paper", "world blocks technical paper", "world banks technical papers", "world bank's technical paper", "world bank technical paper", "work banks technical paper"
"world lake technical paper" » "world lake technical papers", "world plane technical paper", "world game technical paper", "world page technical paper", "world make technical paper", "world take technical paper", "world taken technical paper"
"world large technical paper" » "world large technical papers", "world page technical paper", "world game technical paper", "world core technical paper", "worlds large technical paper", "world largest technical paper", "world's large technical 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 banks technical paper") OR ((("world lake technical paper") OR ("world large technical paper")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"world banks technical paper\") or (((\"world lake technical paper\") OR (\"world large technical paper\"))))".
• Removing quotes may allow a broader search: (( world banks technical paper ) or ((( world lake technical paper ) OR ( world large technical paper )))).
• Adding a wildcard symbol may retrieve word variants: (("world banks technical paper") or ((("world lake technical paper") OR ("world large technical paper"))))*.