Perhaps you should try some spelling variations:
personal communication » interpersonal communication
informations 1.2 » information 1.2, informatics 1.2, information 11.2
der personal » der personalen, der personen, der person
3 developing » 3 development
developing 2 » developing _, developing a, developing e
1.2 der » 2.2 der, 3.2 der, 4.2 der
costs 3 » costs _, costs 4, costs a
2 areal » 2 real, _ areal, 2 areas

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

• Adding a wildcard symbol may retrieve word variants: technologies _ informations 1.2 der personal communication costs 3 developing 2 areal.*.