Perhaps you should try some spelling variations:
rural communications » oral communication, rural telecommunications, cultural communications
la developpement » le developpement, de developpement, et developpement
developpement de » developpement des, developpement durable
der variation » de variation, does variation, die variation
typology der » typologie der, typologien der, typologie des
variation 6 » variation _, variations _, variation des
firms rural » firm rural
6 firms » 4 firms, 4.6 firms, do firms

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

• Adding a wildcard symbol may retrieve word variants: typology der variation 6 firms rural communications _ la developpement de l'afrique.*.