Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
invocation target » inflation target, injection target, inflation targets
a developpement » au developpement, de developpement, le developpement
des l'afrique » de l'afrique, de l'amerique
technology 3 » technology _, technology 1, technology 4
3 invocation » _ invocation, 10 invocation, 3 innovation
target trade » target grade, market trade, target rate
trade 3.1 » trade 3.2, trade 4.1, trade 2.1
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology 3 invocation target trade 3.1 communications costs a developpement des l'afrique.*.