Perhaps you should try some spelling variations:
personal communication » interpersonal communication
technologie die » technologie de, technologie im, technologie der
2.1 developing » 2.2 developing, 2.3 developing, 2.6 developing
developing e » developing _, developing a, developing east
2 personal » 1 personal, 4 personal
costs 2.1 » costs 2.3, costs 4.1, costs 2.2
e areal » _ areal, 2 areal, 4 areal

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

• Adding a wildcard symbol may retrieve word variants: technologie die transformation _ 2 personal communication costs 2.1 developing e areal.*.