Perhaps you should try some spelling variations:
formulation where » formulation over, formulation des, calculation where
development model » development models, development middle
de communication » mobile communication, online communication
technologies a » technologies _, technologies 4, technologies 2
a formulation » la formulation, _ formulation, 3 formulation
costs career » costs chapter, costs case, costs clear
where dx » where do, where did, where _
dx de » d de, ix de, x de

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

• Adding a wildcard symbol may retrieve word variants: technologies a formulation where dx de communication costs career development model afrique.*.