Perhaps you should try some spelling variations:
network formulation » network formation, network simulation, networks circulation
model communication » modern communication, moral communication, modeling communication
formulation model » circulation model, simulation model, population model
technologien a » technologien am, technologien ad, technologien _
1 developing » 3 developing, 4 developing, 2 developing
developing e » developing _, developing a, developing east
a transport » 3 transport, 4 transport, sea transport
costs 1 » costs _, costs 4, costs a
e areal » _ areal, 2 areal, 4 areal

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

• Adding a wildcard symbol may retrieve word variants: technologien a transport network formulation model communication costs 1 developing e areal.*.