Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information centers » information contents, information officers
technologie der » technologie de, technologien des, technologies de
der information » insider information, sector information, labor information
3 developing » 3 development
c personal » a personal, 1 personal, 4 personal
centers c » centers _, centers 3, centers a
costs 3 » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technologie der information centers c personal communication costs 3 developing _ africa.*.