Perhaps you should try some spelling variations:
communications cost » communications costs, communications cross, communication costs
technologien aids » technologien als, technologien ad, technologien des
do communications » 10 communications, 14 communications, 2 communications
aids information » chandos information, series information
2.2 development » 3.2 development, 2.3 development, 4.2 development
4.2 debt » 4.2 der, 4.2 deep, 2.5 debt
cost 2.2 » costs 2.2, cost 2.4, cost 3.2
debt do » debt gdp, debt how
a areas » 1 areas, 2 areas, 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 4.2 debt do communications cost 2.2 development a areas.*.