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
information 1.2 » information 1.5.2, information 2
3 developing » 3 development
1.2 debt » 4.2 debt, 10.8 debt, 1.2 der
debt de » debt do, debt debt, debt gdp
cost 3 » cost 3d, cost e3, cost _

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information 1.2 debt de communication cost 3 developing _ areas.*.