Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
progress information » process information, program information, processes information
economic progress » economic prospects
information wage » information age, information war, information wants
1 communications » 10 communications, 14 communications, 1 communication
developpement en » developpement et, developpement des, developpement de
4 developpement » de developpement, le developpement, et developpement
wage trade » wages trade, wage rate, jade trade
trade 1 » trade _, trade a, trade 4
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: economic progress information wage trade 1 communications costs 4 developpement en afrique.*.