Perhaps you should try some spelling variations:
mobil communication » mobile communication, mobile communications, mobile commusnication
au developpement » du developpement, de developpement, le developpement
developpement de » developpement des, developpement durable
communication 3 » communication _, communication a
technologien 8 » technologien _, technologien 1, technologien 4
informal 2.2 » informal 4.2, informal 8.4, informal _
under mobil » der mobil, under model, under mobutu
8 informal » _ informal, 3 informal, vs informal
de afrique » de l'afrique, en afrique, l afrique
2.2 under » 2.1 under, 6.2 under, 2.2.1 under
3 au » 3 auf, 3 a, 3 zu

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

• Adding a wildcard symbol may retrieve word variants: technologien 8 informal 2.2 under mobil communication 3 au developpement de afrique.*.