Perhaps you should try some spelling variations:
technology change » technological change, technological changes
change traditions » exchange traditions, changes traditional, change predictions
2.7 communication » 2.3 communication, 3.2 communication, 2 communication
developpement du » developpement de, developpement des, developpement et
a developpement » au developpement, de developpement, le developpement
programs 2.7 » programs 2.2, programs 2.1, programs 2.3
du afrique » en afrique, l afrique, de l'afrique
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology change traditions _ programs 2.7 communication costs a developpement du afrique.*.