Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technologien road » technologien ad, technologien und, technologien am
un communication » 3 communication, 4 communication, 1 communication
information und » informations und
2.5 developing » 25.5 developing, 2.2 developing, 1.5 developing
cost 2.5 » costs 2.5, cost 2.4, cost 2.2
a aes » a abs, a aus
_ aes » _ aus, _ abs, _ aws

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 road information und die un communication cost 2.5 developing ((a aes) OR (_ aes)).~".
• Adding a wildcard symbol may retrieve word variants: technologien road information und die un communication cost 2.5 developing ((a aes) OR (_ aes)).*.