Perhaps you should try some spelling variations:
rural communication » rural communications, oral communication, moral communication
technologie die » technologie de, technologie im, technologie der
network modern » network model, network models, network modeling
3.1 developing » 3.3 developing, 3.2 developing, 4.1 developing
die transport » de transport, time transport, le transport
modern rural » modern oral, modern natural, modern ritual
costs 3.1 » costs 3.5, costs 4.1, costs 2.1

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

• Adding a wildcard symbol may retrieve word variants: technologie die transport network modern rural communication costs 3.1 developing _ areas.*.