Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
technologien im » technologie im, technologien am, technologien _
im information » crm information, stm information, 2 information
4 developing » 3 developing
costs 4 » costs _, costs a, costs 4.2
3 use » _ use, 2 use
4 use » _ use, 2 use

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 im information ((3 use) OR (4 use)) voice communication costs 4 developing _ areas.~".
• Adding a wildcard symbol may retrieve word variants: technologien im information ((3 use) OR (4 use)) voice communication costs 4 developing _ areas.*.