Perhaps you should try some spelling variations:
2.3 communication » 3.2 communication, de communication, 4 communication
technologien als » technologien des, technologien fur, technologien und
als information » als informations, aids information, laws information
a developing » a development
developing 2 » developing _, developing a, developing e
costs a » costs _, costs 4
2 areal » 2 real, _ areal, 2 areas
case 3 » case 1
case 2 » case 1

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technologien als information ((case 3) OR (case 2)) 2.3 communication costs a developing 2 areal.~".
• Adding a wildcard symbol may retrieve word variants: technologien als information ((case 3) OR (case 2)) 2.3 communication costs a developing 2 areal.*.