Perhaps you should try some spelling variations:
cash communications » faso communications, data communications, cell communications
developpement de » developpement des, developpement durable
des variation » does variation, de variation, der variation
apologie des » l'apologie des, typologie des, apologien der
does cash » does csr
a des » a der, a das
a de » a die, a der, _ de

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: "apologie des variation _ does cash communications ((a de) OR (a des)) developpement de l'afrique.~".
• Adding a wildcard symbol may retrieve word variants: apologie des variation _ does cash communications ((a de) OR (a des)) developpement de l'afrique.*.