Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
information center » information centers, information centre, information content
technologies 2.1 » technologies _, technologies 4, technologies a
et communication » et communicatione, get communication, debt communication
2.1 information » 3.1 information
3.3 developing » 4 developing, 2 developing, 1 developing
developing em » developing e, developing eq, developing amp
center 3.3 » centers 3.3, center 2.3, center 3.1
em africa » 1 africa
cost 3.3 » cost 3.2, cost 2.3, cost 3.4
3.3 et » 3.3 el, 3.3 eu, 3.3 en

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information center 3.3 et communication cost 3.3 developing em africa.*.