Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information 2.2.3 » information 23.2.3, information 2.2.2, information 2.2.6
technologies 2 » technologies _, technologies 4
developing 21 » developing _, developing a, developing e
ein personal » ein persona, non personal, e personal
a developing » a development
2.2.3 ein » 2.2.1 ein, 2.2.3 die
costs a » costs _, costs 4
21 area » 2.1 area, 1 area, 26 area

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information 2.2.3 ein personal communication costs a developing 21 area.*.