Perhaps you should try some spelling variations:
developpement l » developpement il, developpement la, developpement de
de variation » der variation, die variation, does variation
farm mobile » from mobile, afar mobile, raum mobile
apology de » apologia de, apology mea, apology _
l afrique » en afrique
a le » a les, a l, a e

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: "apology de variation _ farm mobile communication ((a le) OR (a la)) developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: apology de variation _ farm mobile communication ((a le) OR (a la)) developpement l afrique.*.