Perhaps you should try some spelling variations:
communication model » communication media
risi communication » risk communication, crisis communication, risk communications
based information » basic information, based innovation, land information
de development » e development, ce development, de developpement
model de » model due, model d, model du
d risi » de risi, d risk, di crisi
gap d » gap _, gap 4, gap a

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

• Adding a wildcard symbol may retrieve word variants: technology based information gap d risi communication model de development _ afrique.*.