Perhaps you should try some spelling variations:
technical paper » technical papers
gis technical » apis technical, its technical, aws technical
api technical » mali technical, iii technical, i technical
ii technical » 2 technical, 7 technical
world gis » world goes, world go, world get

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 gis technical paper ) OR ( world ((api technical) OR (ii technical)) paper )).
• Adding a wildcard symbol may retrieve word variants: (( world gis technical paper ) or ( world ((api technical) or (ii technical)) paper ))*.