Perhaps you should try some spelling variations:
communication costs » communication systems, communication efforts, communication skills
clean development » human development, urban development, child development
technologies can » technologies a, technologies _, technology can
information need » information needs, information based, information age
can information » care information, change information, fund information
development a » development _, development bank, development banks

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

• Adding a wildcard symbol may retrieve word variants: technologies can information need ice _ communication costs clean development a afrique.*.