Perhaps you should try some spelling variations:
communication 2.3 » communication 23.3, communication 3.3, communication 2.4
2.3 communication » 3.2 communication, de communication, 4 communication
dem developpement » de developpement, des developpements, le developpement
developpement en » developpement et, developpement des, developpement de
technology past » technology park, technology push, technology pt
past infection » plant infection, fast injection, pain infection
infection data » infection rate, infection rates, section data
data scarce » data source, data sparse, data sources
scarce 2.3 » source 2.3, scarce 3
2.3 dem » 2.3 der, 2.3 de, 2.3 den

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

• Adding a wildcard symbol may retrieve word variants: technology past infection data scarce 2.3 communication 2.3 dem developpement en afrique.*.