Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information 6.3 » information 16.3, information 1.3, information 6.1
4 developing » 3 developing
developing 2 » developing _, developing a, developing e
4 personal » a personal, 1 personal, 1945 personal
costs 4 » costs _, costs a, costs 4.2
2 areas » 1 areas, 2 areal, 4 areas
6.3 4 » 6.3 _, 6.3 a, 6.1 4

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 4 personal communication costs 4 developing 2 areas.*.