Perhaps you should try some spelling variations:
rural telecommunications » _ telecommunications
telecommunications 7 » telecommunications _, telecommunications 1, telecommunication _
day developpement » de developpement, du developpement, au developpement
developpement la » developpement de, developpement et, developpement du
der variation » de variation, does variation, die variation
variation des » variation _, variation 6, variation series
la afrique » l afrique, la fabrique, en afrique
its rural » its neural, has rural
des its » des ias, des ids, des faits
7 day » _ day, 7 das, a day
theorie » theories

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

• Adding a wildcard symbol may retrieve word variants: theorie der variation des its rural telecommunications 7 day developpement la afrique.*.