Perhaps you should try some spelling variations:
communication problem » communication problems, communications problems, communicating problem
formulation where » formulation over, formulation des, calculation where
technologies ret » technologies _, technologies 4, technologies 2
la communication » data communication, data communications
d1 developpement » de developpement, du developpement, le developpement
developpement en » developpement et, developpement des, developpement de
ret formulation » et formulation, re formulation, from formulation
problem d1 » problem 1, problem 11, problem der

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

• Adding a wildcard symbol may retrieve word variants: technologies ret formulation where _ la communication problem d1 developpement en afrique.*.