Perhaps you should try some spelling variations:
clean development » human development, urban development
development cases » development case, development phases, development based
technologies co » technologies _, technologies 4, technologies 2
information age » information storage, information access, information about
co information » do information, 2 information, 1 information
cases african » cases africa, class african, slaves african
de mass » de masse, de mais, de masa
a clean » _ clean, a clear
age de » page de, stage de, image de

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

• Adding a wildcard symbol may retrieve word variants: technologies co information age de mass communication a clean development cases african.*.