Perhaps you should try some spelling variations:
developpement de » developpement des, developpement durable
a communication » la communication, data communication, data communications
variation 6 » variation _, variations _, variation des
de afrique » de l'afrique, en afrique, l afrique
6 doner » 6 drones, a donner, im doner
doner a » dorner a, done a
a der » _ der, 2 der, 1 der
3 der » _ der, 2 der
apologia » apologies, apology

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

• Performing a fuzzy search may retrieve terms with similar spellings: apologia _ variation 6 doner a communication ((a der) OR (3 der)) developpement de afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "apologia _ variation 6 doner a communication ((a der) OR (3 der)) developpement de afrique.*".