Perhaps you should try some spelling variations:
persona communication » personal communication, personal communications, personal communicator
technologien der » technologien des, technologie der, technologien fur
developing areas » developing asia, developing east, developing a
der information » insider information, sector information, labor information
2.5 developing » 25.5 developing, 2.2 developing, 1.5 developing
information 3 » information 2
areas arenas » areas trends, seas areas
de persona » de personal, de personas, die persona
costs 2.5 » costs 2.3, costs 3.5, cost 2.5
3 de » 3 die, 3 der, 3 des

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

• Adding a wildcard symbol may retrieve word variants: technologien der information 3 de persona communication costs 2.5 developing areas arenas.*.