Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information center » information centers, information centre, information content
technologies 1 » technologies _, technologies 4, technologies 2
4 developing » 3 developing
developing a » developing _
1 personal » a personal, 4 personal, 1945 personal
center 1 » center _, center a, center 2.1
a africa » 1 africa, can africa, em africa
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 information center 1 personal communication costs 4 developing a africa.*.