Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information centers » information contents, information officers
developing av » developing a, developing ai, developing amp
3 developing » 3 development
1 personal » a personal, 4 personal, 1945 personal
centers 1 » centers 10, centers 21, centers _
av africa » v africa, iv africa, can africa
costs 3 » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information centers 1 personal communication costs 3 developing av africa.*.