Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technologien dis » technologien des, technologien als, technologien im
de communication » mobile communication, online communication
dis information » mis information, aids information, des informations
3.3 developing » 4 developing, 2 developing, 1 developing
information 1 » information 2, information 3, information 3.2
cost 3.3 » cost 3.2, cost 2.3, cost 3.4
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 dis information 1 debt de communication cost 3.3 developing _ areas.*.