Perhaps you should try some spelling variations:
technologies based » technologies used, technology based, technologies a
cell communication » cell communications, oral communication, verbal communication
based formulation » basic formulation, case formulation, based simulation
de developpement » sme development
formulation de » formulation des, formulacion de, formulation du
des afrique » en afrique, de l'afrique
2.5 cell » 2.5 well, 2.2 cell, 3.5 cell
de 2.5 » mode 2.5
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 formulation de 2.5 cell communication a de developpement des afrique.*.