Perhaps you should try some spelling variations:
communication services » telecommunications services
data communication » data communications
au developpement » du developpement, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
der variation » de variation, does variation, die variation
typology der » typologie der, typologien der, typologie des
services au » services a, services ad, services ai
costs data » cost data

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

• Adding a wildcard symbol may retrieve word variants: typology der variation _ costs data communication services au developpement en afrique.*.