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 afrique » de l'afrique, en afrique, l afrique
den rural » do rural, modern rural
bei den » bei der
a bau » a bad, a bab, a ban
a au » a auf, a aus, a a

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "typology _ variation bei den rural communications ((a au) OR (a bau)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology _ variation bei den rural communications ((a au) OR (a bau)) developpement de afrique.*.