Perhaps you should try some spelling variations:
vaccine communication » machine communications, active communication, reactive communication
communication 3.3 » communication _, communication a, communication 1
user development » users development, use development, users developments
development law » development latin, development 1
technologies 3 » technologies _, technologies 4, technologies 2
channels 3.5 » channels 3.2, channels 3.7, channels 3.8
3.5 vaccine » 3.3 vaccine, 3.7 vaccine, 3 vaccine
law afrique » l afrique
3 informal » _ informal, vs informal
3.3 user » 3.1 user, 3.2 user, 4.3 user

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 3.5 vaccine communication 3.3 user development law afrique.*.