Perhaps you should try some spelling variations:
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
developpement de » developpement des, developpement durable
technology 2.2 » technology _, technology 1, technology 3
2.2 innovation » 2.3 innovation, 3 innovation, der innovation
model date » model data, model kate, model update
de afrique » de l'afrique, en afrique, l afrique
date 4.1 » daten 4.1, data 4.1, 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 2.2 innovation model date 4.1 communication costs _ developpement de afrique.*.