Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information 1.3 » information 14.3, information 1.2, information 10.4
ein personal » ein persona, non personal, e personal
3 developing » 3 development
developing 1 » developing _, developing a, developing e
1.3 ein » 5.3 ein, 4.3 ein, 6.3 ein
costs 3 » costs _, costs 4, costs a
1 areas » 1 area, 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 1.3 ein personal communication costs 3 developing 1 areas.*.