Perhaps you should try some spelling variations:
crisis communication » risk communication, mass communication
developpement de » developpement des, developpement durable
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
bus crisis » bust crisis, us crisis, las crisis
a des » a der
a das » 1 das, 2 das, 3 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 _ bus crisis communication ((a des) OR (a das)) developpement de l'afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie de variation _ bus crisis communication ((a des) OR (a das)) developpement de l'afrique.*.