Perhaps you should try some spelling variations:
3.7 communication » 3.2 communication, 2.7 communication, 3.5 communication
et developpement » de developpement, le developpement, test development
developpement de » developpement des, developpement durable
technology use » technology 1, technology 2.2, technology 3
use induction » rule induction, use reduction, use introduction
induction age » induction one, introduction age, induction after
age changes » wage changes, large changes, rate changes
changes 3.7 » changes 13.7, change 3.7, changes 3.2
de afrique » de l'afrique, en afrique, l afrique
costs et » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology use induction age changes 3.7 communication costs et developpement de afrique.*.