Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
de developpement » sme development
developpement de » developpement des, developpement durable
technology do » technology does, technology dlt, technology 1
problems 6.2 » problems 2.2, problems 3.2, problems 6.1
do regional » 4 regional, 2 regional, 3 regional
costs de » 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 do regional urban problems 6.2 communication costs de developpement de l'afrique.*.