Perhaps you should try some spelling variations:
vaccine communication » machine communications, active communication, reactive communication
user development » users development, use development, users developments
development law » development latin, development 1
technologies 3 » technologies _, technologies 4, technologies 2
channels 3.2 » channels 3.5, channels 3.7, channels 3.8
3.2 vaccine » 3.3 vaccine, 3.7 vaccine, 5.2 vaccine
law afrique » l afrique
3 informal » _ informal, vs informal

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

• Adding a wildcard symbol may retrieve word variants: technologies 3 informal channels 3.2 vaccine communication _ user development law afrique.*.