Perhaps you should try some spelling variations:
oral communication » personal communication
information based » information case, information bank, transformation based
technologien des » technologien fur, technologien und, technologies 2
developing areas » developing asia, developing east, developing a
des information » des informations, does information, dis information
4 developing » 3 developing
areas areas » areas arenas, seas areas, areas access
based die » basel die, based deep, based dm
die oral » die moral, die orte
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 des information based die oral communication costs 4 developing areas areas.*.