Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
6.2 communications » 6.2 communication, 4.2 communications, 3.2 communication
information wages » information age, information wants, information war
del developpement » de developpement, des developpements, le developpement
developpement de » developpement des, developpement durable
4a information » a information, via information, lca information
technology 4a » technology 4, technology a, technology 4.1
wages trade » wages race, wharves trade, states trade
de afrique » de l'afrique, en afrique, l afrique
trade 6.2 » trade 2.2, trade 3.2, trade 4.2
costs del » costa del, costo del

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

• Adding a wildcard symbol may retrieve word variants: technology 4a information wages trade 6.2 communications costs del developpement de afrique.*.