Perhaps you should try some spelling variations:
telecommunications series » telecommunications services, telecommunication services, telecommunications service
rural telecommunications » _ telecommunications
developpement de » developpement des, developpement durable
d developpement » de developpement, du developpement, le developpement
variation der » variation des, variation bei, variation _
den rural » do rural, modern rural
series d » series _, series 1, series 2
der den » oder den, der de, der der

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

• Adding a wildcard symbol may retrieve word variants: typologies _ variation der den rural telecommunications series d developpement de l'afrique.*.