Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
oral communication » personal communication
information speed » information sheet, information needed, information needs
von information » von informationen, can information
developpement 1 » developpement 1.4, developpement de, developpement et
technology von » technology vi, technology vt, technology vision
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 von information speed 2 oral communication a leur developpement 1 africa.*.