Perhaps you should try some spelling variations:
basics technical » basic technical, basics techniques, basic technique
technical paper » technical papers
apis technical » api technical, apps technical
app technical » ntp technical, 7 technical, 8 technical
world basics » world basic, word basics, world brics
world apis » world apps, world anis, world kpis

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 apis technical paper ) OR ((( world ((app technical) OR (2 technical)) paper ) OR ( world basics technical paper )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( world apis technical paper ) or ((( world ((app technical) OR (2 technical)) paper ) or ( world basics technical paper ))))".
• Adding a wildcard symbol may retrieve word variants: (( world apis technical paper ) or ((( world ((app technical) OR (2 technical)) paper ) or ( world basics technical paper ))))*.