Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information centers » information contents, information officers
developing 11 » developing _, developing a, developing e
new personal » der personal, how personal, de personal
4 developing » 3 developing
centers new » century new, centers money, centuries new
11 africa » 11 african, 1 africa, 1.1 african
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 _ information centers new personal communication costs 4 developing 11 africa.*.