Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technologien aids » technologien als, technologien ad, technologien des
information cases » information case, information classes, information costs
aids information » chandos information, series information
de communication » mobile communication, online communication
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
cost 2.2 » costs 2.2, cost 2.4, cost 3.2
des de » des dem, des der, des des

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information cases des de communication cost 2.2 developing _ areas.*.