Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
development manuel » developpement manuel, development model, development master
trade development » software development
technologies ret » technologies _, technologies 4, technologies 2
formulation over » formation over, formulation model, formulation where
de communication » mobile communication, online communication
ret formulation » et formulation, re formulation, from formulation
cost trade » costs trade, costly trade, boost trade
over do » over de, ever do, over die
do de » do we, dx de

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

• Adding a wildcard symbol may retrieve word variants: technologies ret formulation over do de communication cost trade development manuel afrique.*.