Perhaps you should try some spelling variations:
innovation effects » innovation effect, innovation efforts, innovating effect
2.5 communication » 2.3 communication, 2.7 communication, 3.5 communication
developpement l » developpement il, developpement la, developpement de
technology 1 » technology _
1 innovation » 2 innovation, 3 innovation, 4 innovation
l afrique » en afrique
from 2.5 » from 2.3, from 25, from 2.9

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

• Adding a wildcard symbol may retrieve word variants: technology 1 innovation effects from 2.5 communication costs _ developpement l afrique.*.