Perhaps you should try some spelling variations:
developpement rural » development rural, developpement durable, development moral
une communication » d'une communication, ante communication, de communication
der developpement » de developpement, des developpements, leur developpement
case formulation » basic formulation, chain formulation, space formulation
technology case » technology based, technology can, technology change
formulation do » formulation de, formulation du, formulation des
rural africa » rural area
does une » does de, does e
do does » do dogs, der does, who does

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

• Adding a wildcard symbol may retrieve word variants: technology case formulation do does une communication _ der developpement rural africa.*.