Perhaps you should try some spelling variations:
information centers » information contents, information officers
debt communication » de communication, et communication, get communication
communication cost » communication costs, communication costa, communications costs
technologies 4 » technologies _
1.2 developing » 12.2 developing, 13.2 developing, 2.2 developing
4 information » 2 information, 1 information
centers 1 » centers 10, centers 21, centers _
cost 1.2 » cost 3.2, cost 12, cost 2.2
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: technologies 4 information centers 1 debt communication cost 1.2 developing _ africa.*.