Perhaps you should try some spelling variations:
actors communication » actions communication, active communication, networks communication
technologies user » technologies ser, technologies used, technologies uses
user informations » user information, users information, der informations
development en » developpement en, development menu, development eco
des actors » des autors, des acteurs, des actions
und des » und der

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies user informations und des actors communication costs _ development en afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies user informations und des actors communication costs _ development en afrique.*.