Perhaps you should try some spelling variations:
personal communication » interpersonal communication
technologien dis » technologien des, technologien als, technologien im
dis information » mis information, aids information, des informations
developing area » developing areas, developing asia, developing real
information 2 » information 3
bern personal » der personal, era personal, deren personale
4 developing » 3 developing
area optimal » pareto optimal, aware optimal, based optimal
costs 4 » costs _, costs a, costs 4.2
2 bern » 23 bern, _ bern, 2 bayern

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

• Adding a wildcard symbol may retrieve word variants: technologien dis information 2 bern personal communication costs 4 developing area optimal.*.