Perhaps you should try some spelling variations:
personal communication » interpersonal communication
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
information und » informations und
laden personal » leaders personal, der personal, de personal
3.3 developing » 4 developing, 2 developing, 1 developing
und laden » und baden, und landern, und beladen
costs 3.3 » costs 2.3, costs 3.5, costs 4.3

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information und laden personal communication costs 3.3 developing _ access.*.