Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
developpement l » developpement il, developpement la, developpement de
des variation » does variation, de variation, der variation
typology des » typologie des, typologie der, typology _
l afrique » en afrique
does de » does debt
a bet » a bent, a beta, a bit

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

• Performing a fuzzy search may retrieve terms with similar spellings: typology des variation _ does de communication ((a bet) OR (a best)) developpement l afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "typology des variation _ does de communication ((a bet) OR (a best)) developpement l afrique.*".