Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 informations » 2.1 information, 9.2.1 informations, 3.1 information
un communication » 3 communication, 4 communication, 1 communication
2.5 developing » 25.5 developing, 2.2 developing, 1.5 developing
developing a » developing _
cost 2.5 » costs 2.5, cost 2.4, cost 2.2
a aes » _ aes, a abs, a aus
und » fund

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 informations und die un communication cost 2.5 developing a aes.*.