Perhaps you should try some spelling variations:
model simulations » model simulation
simulations rates » simulations notes, simulation states, simulations based
2.3 communication » 3.2 communication, de communication, 4 communication
technology model » technology models, technology code, technology moral
au developpement » du developpement, de developpement, le developpement
developpement la » developpement de, developpement et, developpement du
rates trade » states trade, rules trade, wages trade
la afrique » l afrique, la fabrique, en afrique
trade 2.3 » trade 2.2, trade 2.1, trade 1.3

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

• Adding a wildcard symbol may retrieve word variants: technology model simulations rates trade 2.3 communication _ au developpement la afrique.*.