Perhaps you should try some spelling variations:
4.2 communication » 4.2 communications, 3.2 communication, 4.1 communication
technology trade » technology trends, technology transfer, technology transfers
trade innovation » trade information, drive innovation, trade integration
developpement en » developpement et, developpement des, developpement de
a developpement » au developpement, de developpement, le developpement
model date » model data, model kate, model update
date 4.2 » daten 4.2, data 4.2, rate 4.2
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 trade innovation model date 4.2 communication costs a developpement en afrique.*.