Perhaps you should try some spelling variations:
innovation effects » innovation effect, innovation efforts, innovating effect
23 communication » 2.3 communication, 3 communication, 13 communication
developpement de » developpement des, developpement durable
technology back » technology book, technology stacks, technology based
back innovation » back innovations, lacks innovation, track innovation
4 developpement » de developpement, le developpement, et developpement
de afrique » de l'afrique, en afrique, l afrique
from 23 » from 2.3, from 20, from 25
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology back innovation effects from 23 communication costs 4 developpement de afrique.*.