Perhaps you should try some spelling variations:
technologies based » technologies used, technology based, technologies a
based optimization » based organization
les communications » laos communications, nps communications, u.s communications
die developpement » de developpement, le developpement, du developpement
communications a » communications _, communications law, communications media
optimization a » optimization _, optimization 6, optimization 3
des afrique » en afrique, de l'afrique
a diead » a dead
a die » 2 die, 3 die, _ die

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

• Adding a wildcard symbol may retrieve word variants: technologies based optimization a diead les communications a die developpement des afrique.*.