Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information centre » information centers, information contents
technologies aids » technologies varies, technologies a, technologies de
aids information » chandos information, series information
4 developing » 3 developing
developing a » developing _
un personal » non personal, von personal, 1 personal
centre un » entre un, central un, centre auf
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 aids information centre un personal communication costs 4 developing a africa.*.