Perhaps you should try some spelling variations:
developpement durable » developpement de
leur developpement » le developpement, deux developpements, de developpement
oral communication » personal communication
information speed » information sheet, information needed, information needs
2.2 information » 4.2 information, 2.2.3 information, 2.2 transformation
technology 2.2 » technology _, technology 1, technology 3
durable africa » rural africa
speed 2 » speed _, speed 4, speed 1
2 oral » _ oral, 4 oral

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

• Adding a wildcard symbol may retrieve word variants: technology 2.2 information speed 2 oral communication a leur developpement durable africa.*.