Perhaps you should try some spelling variations:
persona communication » personal communication, personal communications, personal communicator
information centre » information centers, information contents
developing east » development east, developing a, developing asia
4.3 developing » 3.3 developing, 1.3 developing, 7.3 developing
east africa » west africa
de persona » de personal, de personas, die persona
centre de » centre _, centrale des
costs 4.3 » costs 4.2, costs 4.4, costs 2.3

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information centre de persona communication costs 4.3 developing east africa.*.