Perhaps you should try some spelling variations:
der developpement » de developpement, des developpements, leur developpement
3.2 communication » 3 communication, 2.3 communication, de communication
technology never » technology number, technology needs, technology new
never infection » need infection, never perfection, several infections
communication 3 » communication _, communication a
infection data » infection rate, infection rates, section data
data source » data sources
des afrique » en afrique, de l'afrique
source 3.2 » sources 3.2, source 2.2, source 2.3
3 der » _ der, 2 der

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

• Adding a wildcard symbol may retrieve word variants: technology never infection data source 3.2 communication 3 der developpement des afrique.*.