Perhaps you should try some spelling variations:
exchange information » change information, exchange intervention
based communication » brand communication, based compensation, mediated communication
economic exchange » economic change, economic changes
developpement de » developpement des, developpement durable
information 2.4 » information 2.2, information 2.7, information 2.0
a developpement » au developpement, de developpement, le developpement
coal based » coal bed, cell based, school based
de afrique » de l'afrique, en afrique, l afrique
2.4 coal » 10.4 coal, 2.4 carl, 2.4 cmql
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: economic exchange information 2.4 coal based communication costs a developpement de afrique.*.