Perhaps you should try some spelling variations:
trade developpement » trade developement, trade development, de developpement
data communication » data communications
formulation over » formation over, formulation model, formulation where
developpement en » developpement et, developpement des, developpement de
over do » over de, ever do, over die
do data » eo data, go data, geo data

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

• Adding a wildcard symbol may retrieve word variants: technologies _ formulation over do data communication a trade developpement en afrique.*.