Perhaps you should try some spelling variations:
bank's technical » banks technical, bands technical, bank technical
basics technical » basics techniques, basic technique, statistics technical
technical paper » technical papers
basic technical » basic mechanical, basic technique, basic techniques

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 bank's technical paper ) OR ( world ((basics technical) OR (basic technical)) paper )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( world bank's technical paper ) or ( world ((basics technical) OR (basic technical)) paper ))".
• Adding a wildcard symbol may retrieve word variants: (( world bank's technical paper ) or ( world ((basics technical) OR (basic technical)) paper ))*.