Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
information case » information based, information can, information costs
de communication » mobile communication, online communication
2.4 development » 2.3 development, 2.1 development, 2.2 development
case des » cases des, case das, phase des
a areas » 1 areas, 2 areas, 4 areas
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 case des de communication cost 2.4 development a areas.*.