Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technologien aids » technologien als, technologien ad, technologien des
information based » information case, information bank, transformation based
ddr communication » de communication, csr communication, under communication
aids information » chandos information, series information
3.3 developing » 4 developing, 2 developing, 1 developing
developing 2 » developing _, developing a, developing e
based des » based modes, based debt, based deep
cost 3.3 » cost 3.2, cost 2.3, cost 3.4
des ddr » der ddr, des dr, dem ddr
2 areas » 1 areas, 2 areal, 4 areas

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information based des ddr communication cost 3.3 developing 2 areas.*.