Perhaps you should try some spelling variations:
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
technologien fur » technologien des, technologien und, technologies 2
information case » information based, information can, information costs
fur information » zur information, fair information, your information
a areal » _ areal, 4 areal, a areas
2 areal » 2 real, _ areal, 2 areas
case 2 » case 1
2 3.1 » _ 3.1, i 3.1, a 3.1

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 fur information case 2 3.1 communication costs _ developing ((a areal) OR (2 areal)).~".
• Adding a wildcard symbol may retrieve word variants: technologien fur information case 2 3.1 communication costs _ developing ((a areal) OR (2 areal)).*.