Perhaps you should try some spelling variations:
models development » model development, module development, model developments
communication cost » communication costs, communication costa, communications costs
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
technology price » technology rich, technology voice, technology service
inflation states » inflation rates, inflation taxes, inflation starts
development li » development lid, development lie, development lin
cost models » cost model, logit models
li afrique » l afrique, en afrique
case 4.1 » case 4.2, case 1

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

• Adding a wildcard symbol may retrieve word variants: technology price inflation states case 4.1 communication cost models development li afrique.*.