Perhaps you should try some spelling variations:
rural communications » oral communication, rural telecommunications, cultural communications
developpement de » developpement des, developpement durable
variation bei » variation des, variation der, variation _
de variation » der variation, die variation, does variation
typology de » typology _, typology 6, typology a
de afrique » de l'afrique, en afrique, l afrique
2 rural » a rural
bei 2 » bei _, bei a
a des » a der, a das
a de » a die, a der, _ de

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

• If you are trying to use Boolean operators, they must be ALL CAPS: typology de variation bei 2 rural communications ((a de) OR (a des)) developpement de afrique.~.
• Adding a wildcard symbol may retrieve word variants: typology de variation bei 2 rural communications ((a de) or (a des)) developpement de afrique.*.