Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
developpement la » developpement de, developpement et, developpement du
innovation node » innovation nodes, innovation code, innovation model
technology u.s » technology uses, technology 2.2, technology use
u.s innovation » does innovation
la afrique » l afrique, la fabrique, en afrique
node date » node case
date 6.2 » daten 6.2, data 6.2, date 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology u.s innovation node date 6.2 communication costs _ developpement la afrique.*.