Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
4.2 developpement » 4.2 development, de developpement, le developpement
technology trade » technology trends, technology transfer, technology transfers
trade innovation » trade information, drive innovation, trade integration
developpement en » developpement et, developpement des, developpement de
model date » model data, model kate, model update
date 6.2 » daten 6.2, data 6.2, date 4.2

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 6.2 communication costs 4.2 developpement en afrique.*.