Perhaps you should try some spelling variations:
formulation model » circulation model, simulation model, population model
trade development » software development
communication 3 » communication _, communication a
technologies 2 » technologies _, technologies 4
development il » development ii, development iv, development ix
2 formulation » _ formulation, 3 formulation, la formulation
model does » model codes, model deep, model dom
il afrique » l afrique, en afrique
3 trade » 1 trade, 4 trade, 2 trade

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 formulation model does _ communication 3 trade development il afrique.*.