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
technology user » technology users, technology use, technology used
user innovation » der innovation, serie innovation, gender innovation
model date » model data, model kate, model update
la afrique » l afrique, la fabrique, en afrique
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 user innovation model date 6.2 communication costs _ developpement la afrique.*.