Perhaps you should try some spelling variations:
technologies based » technologies used, technology based, technologies a
based formulation » basic formulation, case formulation, based simulation
formulation needs » formulation des, information needs, formulation de
de communication » mobile communication, online communication
de developpement » sme development
developpement l » developpement il, developpement la, developpement de
needs using » needed using, needs doing, needs going
l afrique » en afrique
using de » using dea, using dem, using due
costs de » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technologies based formulation needs using de communication costs de developpement l afrique.*.