Perhaps you should try some spelling variations:
technical paper » technical papers
apis technical » api technical, basics technical, actions technical
apps technical » app technical, basics technical, access technical
world apis » world anis, world kpis, world april
world apps » world app

You may be able to get more results by adjusting your search query.

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