Perhaps you should try some spelling variations:
"world banks technical paper" » "world basics technical paper", "world apis technical paper", "world apps technical paper", "world banks technical papers", "world bank's technical paper", "work banks technical paper", "world back technical paper"
"world tasks technical paper" » "world tasks technical papers", "world cases technical paper", "world classes technical paper"
"world stack technical paper" » "world stack technical papers", "world state technical paper", "world stock technical paper", "world attack technical paper", "world stocks technical paper"
"world bank technical paper" » "world bank technical papers", "world back technical paper", "world lanka technical paper", "world bands 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 tasks technical paper"))) OR ("world stack technical paper"))) OR ("world bank technical paper")).
• Removing quotes may allow a broader search: (((((( world banks technical paper ) or ( world tasks technical paper ))) or ( world stack technical paper ))) or ( world bank technical paper )).
• Adding a wildcard symbol may retrieve word variants: (((((("world banks technical paper") or ("world tasks technical paper"))) or ("world stack technical paper"))) or ("world bank technical paper"))*.