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
communications a » communications _, communications law, communications media
de developpement » sme development
optimization a » optimization _, optimization 6, optimization 3
des afrique » en afrique, de l'afrique
dead les » read less, dead sea, dead yet
a dead » a decade, a demand
a de » a die, a der, a des

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 dead les communications a de developpement des afrique.*.