Perhaps you should try some spelling variations:
mobile communications » mobile communication
communications costs » communication costs, communications _
overview section » overview social
au developpement » du developpement, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
trade mobile » trade motives, trade profile, trade models
section 3 » section 1, section 2
costs au » costs a, costs amy, costs _
3 trade » 1 trade, 4 trade, 2 trade

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

• Adding a wildcard symbol may retrieve word variants: methods overview section 3 trade mobile communications costs au developpement en afrique.*.