Perhaps you should try some spelling variations:
technologies further » technologies other, technologies authors, technologies barriers
voice communications » mobile communications, guinea communications, online communications
communications costs » communication costs, communications _
further information » customer information
information 3 » information 2
4 developing » 3 developing
developing 2 » developing _, developing a, developing e
und voice » one voice
costs 4 » costs _, costs a, costs 4.2
2 areas » 1 areas, 2 areal, 4 areas
3 und » 13 und, 23 und, _ und

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

• Adding a wildcard symbol may retrieve word variants: technologies further information 3 und voice communications costs 4 developing 2 areas.*.