Perhaps you should try some spelling variations:
persona communication » personal communication, personal communications, personal communicator
communication cost » communication costs, communication costa, communications costs
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
information 2.5 » information 2.2, information 2.7, information 2.0
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
debt persona » de persona, die persona, ein persona
2.5 debt » 2.5 der, 2.5 deep
cost 2.2 » costs 2.2, cost 2.4, cost 3.2

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information 2.5 debt persona communication cost 2.2 developing _ areas.*.