Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
de developpement » sme development
developpement il » developpement de, developpement et, developpement du
der variation » does variation, die variation, zur variation
de variation » die variation, does variation, de validation
il afrique » l afrique, en afrique
a de » a die, a der, a des

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: "typology ((der variation) OR (de variation)) _ der de communication a de developpement il afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology ((der variation) OR (de variation)) _ der de communication a de developpement il afrique.*.