Perhaps you should try some spelling variations:
communication modes » communication costs, communication media, communication methods
risk communication » _ communication, mobile communication
information need » information needs, information based, information age
technologies a » technologies _
de development » e development, de developpement, code development
a information » _ information, land information, award information
modes de » modes _, does de
does » des

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies a information need does risk communication modes de development _ afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies a information need does risk communication modes de development _ afrique.*.