Perhaps you should try some spelling variations:
"world bank's technical papers" » "world banks technical papers", "world bands technical papers", "world bank technical papers"
"world basic technical paper" » "world basic mechanical paper", "world basic technique paper", "world basic techniques paper", "world bicssc technical paper"
"world music technical paper" » "world music mechanical paper", "world basics technical paper", "world using 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 basic technical paper") OR ("world music technical paper"))) OR ("world bank's technical papers")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"world basic technical paper\") OR (\"world music technical paper\"))) or (\"world bank's technical papers\"))".
• Removing quotes may allow a broader search: (((( world basic technical paper ) OR ( world music technical paper ))) or ( world bank's technical papers )).
• Adding a wildcard symbol may retrieve word variants: (((("world basic technical paper") OR ("world music technical paper"))) or ("world bank's technical papers"))*.