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
de communication » mobile communication, online communication
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
information 1 » information 2, information 3, information 3.2
cost 2.2 » costs 2.2, cost 2.4, cost 3.2
debt de » debt do, debt debt, debt gdp
1 debt » 3 debt, 4 debt

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information 1 debt de communication cost 2.2 developing _ areas.*.