Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
paper communications » power communication, face communications, layer communication
der transformation » die transformation, zur transformation, energy transformation
technologies der » technologies de, technologie der, technologies under
transformation a » transformation _
papers paper » papers papers, papers chapter, papers other
4 developing » 3 developing
developing 1 » developing _, developing a, developing e
a papers » _ papers, 2 papers, a paper
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies der transformation a papers paper communications costs 4 developing 1 africa.*.