Perhaps you should try some spelling variations:
communication cost » communication costs, communications costs, communication mode
clean development » human development, urban development, child development
risk information » aids information, bank information, tourism information
technology risk » technology ict, technology park, technology push
development a » development _, development bank, development banks
de mobile » does mobile, _ mobile, a mobile

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

• Adding a wildcard symbol may retrieve word variants: technology risk information _ de mobile communication cost clean development a afrique.*.