Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
developpement en » developpement et, developpement des, developpement de
4 communication » 3 communication, 5.4 communication, de communication
infection data » infection rate, infection rates, section data
data spaces » data sources
spaces 4 » spaces _, spaces 3, spaces 1

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

• Adding a wildcard symbol may retrieve word variants: technology _ infection data spaces 4 communication a leur developpement en afrique.*.