Perhaps you should try some spelling variations:
developpement en » developpement et, developpement des, developpement de
typologie cices » typologie eines, typologie des
cices variation » price variation, die variation, does variation
led mass » led cases, hnd mass
a bent » a best
a bet » a best, a beta, a bit

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: "typologie cices variation _ led mass communication ((a bet) OR (a bent)) developpement en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie cices variation _ led mass communication ((a bet) OR (a bent)) developpement en afrique.*.