Perhaps you should try some spelling variations:
3.3 communication » 2.3 communication, 3.2 communication, 3.5 communication
technologien und » technologie und, technologien des, technologien fur
und information » fund information, road information, award information
a developing » a development
developing a » developing _
costs a » costs _, costs 4
a areal » _ areal, 2 areal, 4 areal
case a » case 1, case 3, case 4
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 und information ((case a) OR (case 2)) 3.3 communication costs a developing a areal.~".
• Adding a wildcard symbol may retrieve word variants: technologien und information ((case a) OR (case 2)) 3.3 communication costs a developing a areal.*.