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", "world bank technical paper", "work banks technical paper"
"world tasks technical paper" » "world tasks technical papers", "world basics technical paper", "world apis technical paper", "world aws technical paper"
"world jack technical paper" » "world jack technical papers", "world rack technical paper", "world stack technical paper", "world track technical paper", "world packet technical paper", "world attack technical paper"
"world pack technical paper" » "world pack technical papers", "world rack technical paper", "world stack technical paper", "world track technical paper", "world packet technical paper", "world peace technical paper", "world place 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 jack technical paper"))) OR ("world pack technical paper")).
• Removing quotes may allow a broader search: (((((( world banks technical paper ) or ( world tasks technical paper ))) or ( world jack technical paper ))) or ( world pack technical paper )).
• Adding a wildcard symbol may retrieve word variants: (((((("world banks technical paper") or ("world tasks technical paper"))) or ("world jack technical paper"))) or ("world pack technical paper"))*.