Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information content » information contents, information centers, information centre
technologien als » technologien des, technologien fur, technologien und
als information » als informations, aids information, laws information
4.1 developing » 3.1 developing, 4 developing, 3.3 developing
2 personal » 1 personal, 4 personal
content 2 » content _, content 1, content 3
costs 4.1 » costs 4.2, costs 4.4, costs 4.3

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

• Adding a wildcard symbol may retrieve word variants: technologien als information content 2 personal communication costs 4.1 developing _ africa.*.