Perhaps you should try some spelling variations:
persona communication » personal communication, personal communications, personal communicator
information centers » information contents, information officers
developing areas » developing asia, developing east, developing a
technologies 1 » technologies _, technologies 4, technologies 2
a developing » a development
areas africa » arabs africa, dress africa, farmers africa
centers de » centers _, centres de, centers 10
de persona » de personal, de personas, die persona
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 information centers de persona communication costs a developing areas africa.*.