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 high » technology rights, technology how, technology help
development lid » development led, development li, development lie
rate states » state states, data states, rate estimates
cost models » cost model, logit models
lid afrique » l afrique
states 4.1 » states 1, states 3.2

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

• Adding a wildcard symbol may retrieve word variants: technology high inflation rate states 4.1 communication cost models development lid afrique.*.