Perhaps you should try some spelling variations:
communication model » communication media
oral communication » personal communication
information need » information needs, information needed, information speed
step development » system development, foster development, crop development
technologies 1 » technologies _, technologies 4, technologies 2
model step » model setup, model set, model scip
need de » need le, need fide, need one
de oral » de otras, new oral

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies 1 information need de oral communication model step development _ afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies 1 information need de oral communication model step development _ afrique.*.