Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technology choice » technology change
choice inflation » choice information, price inflation
4 communications » 14 communications, 4 communication, 2 communications
developpement il » developpement de, developpement et, developpement du
inflation state » inflation starts, inflation rate, simulation state
a developpement » au developpement, de developpement, le developpement
state trade » states trade, states traded, slave trade
il afrique » l afrique, en afrique
trade 4 » trade _, trade a
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 choice inflation state trade 4 communications costs a developpement il afrique.*.