Perhaps you should try some spelling variations:
oral communication » personal communication
technologies era » technologies a, technologies art, technologies e
au developpement » du developpement, de developpement, le developpement
developpement de » developpement des, developpement durable
era transition » eca transition, a transition, la transition
transition a » transition _
de africa » does africa, de america, use africa
der oral » der moral, der ort, der orte
media au » medias au, media a, media ai
a der » _ der, 2 der, 3 der

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

• Adding a wildcard symbol may retrieve word variants: technologies era transition a der oral communication media au developpement de africa.*.