Perhaps you should try some spelling variations:
clean development » human development, urban development
role information » rhode information, more information, one information
information need » information needs, information needed, information speed
technology role » technology's role, technology risk, technology r
costs clean » costs clear
le mobile » lte mobile, e mobile, less mobile
need le » need one

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

• Adding a wildcard symbol may retrieve word variants: technology role information need le mobile communication costs clean development _ afrique.*.