Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
voice communications » mobile communications, guinea communications, online communications
developing learning » development learning, developing teaching
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
information case » information based, information can, information costs
learning access » learning across, learning process, gaining access
4 developing » 3 developing
die voice » cine voice, one voice
case die » case drive, phase die, case d
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information case die voice communications costs 4 developing learning access.*.