Perhaps you should try some spelling variations:
proper communication » power communication, prone communication, provider communication
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
variation des » variation _, variation 6, variation series
der proper » der property, over proper, der oper
des der » des dr, des ddr, des dem
a de » a die, a der, a des

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

• Adding a wildcard symbol may retrieve word variants: typology _ variation des der proper communication a de developpement en afrique.*.