Perhaps you should try some spelling variations:
net developpement » et developpement, de developpement, le developpement
2.3 communication » 3.2 communication, de communication, 4 communication
technology costs » technology cost, technology course, technology case
costs innovation » cost innovation, foster innovation, costs information
innovation rate » innovation race, innovation create, innovation state
des afrique » en afrique, de l'afrique
rate rule » rate rules, trade rule
rule 2.3 » rule 1.3, rule 2.2, rule 2.5

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

• Adding a wildcard symbol may retrieve word variants: technology costs innovation rate rule 2.3 communication costs net developpement des afrique.*.