Perhaps you should try some spelling variations:
vaccine communication » machine communications, active communication, reactive communication
communication process » communication processes, communication protocols, communication practices
3 developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
information a » information age, information about
5.12 vaccine » 5.1 vaccine, 5.2 vaccine, 5.3 vaccine
l afrique » en afrique
a 5.12 » a 5.1, a 5.2

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information a 5.12 vaccine communication process 3 developpement l afrique.*.