Perhaps you should try some spelling variations:
communication model » communication media
policy innovation » policy innovations, policy integration
lay communication » way communication, layer communication, why communication
innovation from » innovations from
de development » e development, ce development, de developpement
model de » model due, model d, model du
from do » from dog, from don, from de

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

• Adding a wildcard symbol may retrieve word variants: technology policy innovation from do lay communication model de development _ afrique.*.