Perhaps you should try some spelling variations:
when communication » where communication, open communication, sign communication
communication cost » communication costs, communication costa, communications costs
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
14.4 developing » 1.4 developing, 12.4 developing, 10.4 developing
contents das » contents data, contents fase, contents maps
developing 1 » developing _, developing a, developing e
cost 14.4 » costs 14.3, cost 2.4, cost 1.2
das when » das wesen, bars when, bias when

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information contents das when communication cost 14.4 developing 1 africa.*.