Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information 15.2 » information 1.5.2, information 1.2, information 1.3
technologien 2 » technologies 2, technologien _, technologien 1
non personal » 1 personal, 4 personal, 2 personal
4 developing » 3 developing
developing 2 » developing _, developing a, developing e
15.2 non » 1.2 non, 10.2 non, 16.2 non
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 2 information 15.2 non personal communication costs 4 developing 2 real.*.