Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information 6.3 » information 16.3, information 1.3, information 6.1
a developing » a development
developing 2 » developing _, developing a, developing e
2 personal » 1 personal, 4 personal
costs a » costs _, costs 4
2 areal » 2 real, _ areal, 2 areas
6.3 2 » 6.3 _, 6.3 a, 1.3 2

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

• Adding a wildcard symbol may retrieve word variants: technologien _ information 6.3 2 personal communication costs a developing 2 areal.*.