Perhaps you should try some spelling variations:
cell communications » cell communication, health communications, rural communications
developpement de » developpement des, developpement durable
variation aid » variation im, variation und, variation a
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
do cell » dc cell, does cell, dry cell
aid do » aid go, did do, aid does
a das » 1 das, 2 das, _ das
3 das » 1 das, 2 das

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "typologie de variation aid do cell communications ((a das) OR (3 das)) developpement de l'afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie de variation aid do cell communications ((a das) OR (3 das)) developpement de l'afrique.*.