Perhaps you should try some spelling variations:
personal communication » interpersonal communication
informations costs » information costs, information cost, informations sur
developing areas » developing asia, developing east, developing a
technologien am » technologien im, technologien als, technologie im
am informations » a informations, als informations, aux informations
areas arenas » areas trends, seas areas
4 personal » a personal, 1 personal, 1945 personal
costs 4 » costs a, costs 4.2, costs 4.4

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

• Adding a wildcard symbol may retrieve word variants: technologien am informations costs 4 personal communication costs _ developing areas arenas.*.