Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information 6.3 » information 16.3, information 1.3, information 6.1
non personal » 1 personal, 4 personal, 2 personal
3 developing » 3 development
developing a » developing _
6.3 non » 16.3 non, 4.3 non, 5.3 non
costs 3 » costs _, costs 4, costs a
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 _ information 6.3 non personal communication costs 3 developing a areas.*.