Perhaps you should try some spelling variations:
communication costs » communication systems, communication efforts, communication skills
clean development » human development, urban development, child development
information gaps » information gap, information flows, information needs
how information » new information, job information, _ information
technology how » technology law, technology shock, technology cost
development a » development _, development bank, development banks

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

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