Perhaps you should try some spelling variations:
mobile communications » mobile communication
communications costs » communication costs, communications _
des developpement » des developpements, de developpement, le developpement
developpement la » developpement de, developpement et, developpement du
method overview » methods overview
trade mobile » trade motives, trade profile, trade models
la afrique » l afrique, la fabrique, en afrique
costs des » costs fees
social 4 » social _, social a
4 trade » 1 trade

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

• Adding a wildcard symbol may retrieve word variants: method overview social 4 trade mobile communications costs des developpement la afrique.*.