Perhaps you should try some spelling variations:
personal communication » interpersonal communication
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
developing seas » developing areas, developing east, developing self
der personal » der personalen, der personen, der person
4 developing » 3 developing
3.2 der » 2.2 der
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information 3.2 der personal communication costs 4 developing seas areas.*.