Perhaps you should try some spelling variations:
das developpements » des developpements, deux developpements, de developpement
1.1 communication » 4.1 communication, 1.3 communication, 1.4 communication
developpements de » developpement de, developpement des, developpement du
communication 3 » communication _, communication a
infection data » infection rate, infection rates, section data
sources 1.1 » sources 3.1, sources 5.1, sources 3.2
3 das » 1 das, 2 das

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

• Adding a wildcard symbol may retrieve word variants: technology _ infection data sources 1.1 communication 3 das developpements de l'afrique.*.