Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
mode communications » modern communications, mce communications, mobile communications
developpement de » developpement des, developpement durable
4 developpement » de developpement, le developpement, et developpement
technology 12 » technology 1.2, technology 1, technology 2
12 inflation » 10 inflation, 2 inflation, 3.2 inflation
rate trade » trade trade, water trade, state trade
trade mode » trade model, trade more, trade models
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: technology 12 inflation rate trade mode communications costs 4 developpement de l'afrique.*.