Perhaps you should try some spelling variations:
rural communications » oral communication, rural telecommunications, cultural communications
developpement de » developpement des, developpement durable
der variation » de variation, does variation, die variation
variation a » variation _, variation 6, variation 5
right rural » right real
de fabrique » la fabrique, de l'afrique
a bau » a bad, a bab, a ban
a au » a auf, a aus, a a
theorie » theories

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: "theorie der variation a right rural communications ((a au) OR (a bau)) developpement de fabrique.~".
• Adding a wildcard symbol may retrieve word variants: theorie der variation a right rural communications ((a au) OR (a bau)) developpement de fabrique.*.