Perhaps you should try some spelling variations:
persons communication » personal communication, personal communications, garrisons communication
technologien aids » technologien als, technologien ad, technologien des
information based » information case, information bank, transformation based
aids information » chandos information, series information
4 developing » 3 developing
developing a » developing _
based older » based order, based fodder, based elderly
costs 4 » costs _, costs a, costs 4.2
a areas » 1 areas, 2 areas, 4 areas

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information based older persons communication costs 4 developing a areas.*.