Perhaps you should try some spelling variations:
technologies author » technologies authors, technology author, technologies methods
voice communication » voice communications, mobile communication, device communication
author information » further information, other information, motor information
communication cost » communication costs, communication costa, communications costs
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
information 2 » information 3
developing 4 » developing _, developing a, developing e
und voice » one voice
cost 2.2 » costs 2.2, cost 2.4, cost 3.2
4 areas » 1 areas, 2 areas, 4 areal
2 und » _ und, i und

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

• Adding a wildcard symbol may retrieve word variants: technologies author information 2 und voice communication cost 2.2 developing 4 areas.*.