Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
developpement en » developpement et, developpement des, developpement de
innovation case » innovation based, innovation chapter, innovation center
technology 3 » technology _, technology 1, technology 4
3 innovation » 2 innovation
case data » cases data, base data, use data
data 6.2 » data 2.2, data 6.3, data 1.2

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

• Adding a wildcard symbol may retrieve word variants: technology 3 innovation case data 6.2 communication costs _ developpement en afrique.*.