Perhaps you should try some spelling variations:
clean development » human development, urban development
information gaps » information gap
technologies 2 » technologies _, technologies 4
costs clean » costs clear
gaps de » gaps do, camps de, gaps new
de mass » de masse, de mais, de masa

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies 2 information gaps de mass communication costs clean development _ afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies 2 information gaps de mass communication costs clean development _ afrique.*.