Perhaps you should try some spelling variations:
under communications » under communication, border communications, modern communications
communications costs » communication costs, communications _
information centers » information contents, information officers
23.4 developing » 13.4 developing, 2.4 developing, 3.4 developing
developing a » developing _
centers 2.3 » center 2.3, centers 2.2, centers 2.8
costs 23.4 » costs 2.4, costs 4.4, costs 2.3
2.3 under » 2.1 under, 2.2 under, 2.3 unser
a africa » 1 africa, can africa, em africa

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information centers 2.3 under communications costs 23.4 developing a africa.*.