Perhaps you should try some spelling variations:
communication model » communication media
ret informational » report informational, what informational, _ informational
technologies ret » technologies _, technologies 4, technologies 2
informational et » informational _, informational annex, informational gaps
development aid » development a, development africa, development agenda
de mass » de masse, de mais, de masa
model a » model 1

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies ret informational et de mass communication model a development aid afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies ret informational et de mass communication model a development aid afrique.*.