Perhaps you should try some spelling variations:
mechanical proper » mechanical property, mechanical power, mechanical probes
basics technical » basic technical, basics techniques, basic technique
mechanical paper » mechanical power, mechanical powers, mechanical patent
banks technical » tasks technical, blocks technical, apis technical
word basics » world basic, bond basics, cord basic
world banks » world bank's, world bank, work banks
cad basic » ipad basic, land basic, cord basic

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