Perhaps you should try some spelling variations:
information centre » information centers, information contents
debt communication » de communication, et communication, get communication
communication cost » communication costs, communication costa, communications costs
technologien des » technologien fur, technologien und, technologies 2
des information » des informations, does information, dis information
developing data » developing a, developing asia, developing east
5.4 developing » 6.4 developing, 3.3 developing, 2.2 developing
data africa » ratha african, intra africa, baga african
centre 2.3 » centre 2.4.3, century 2.3, centre 2013
2.3 debt » 2.5 debt, 2.3 delta, 2.3 der
cost 5.4 » costs 5.4, cost 2.4, cost 3.4

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

• Adding a wildcard symbol may retrieve word variants: technologien des information centre 2.3 debt communication cost 5.4 developing data africa.*.