Perhaps you should try some spelling variations:
models development » model development, module development, model developments
communication cost » communication costs, communication costa, communications costs
5.4 communication » de communication, data communication
development east » development southeast, development 1
a information » 2 information, 1 information
information b » information 2, information 1, information bank
technology a » technology 1, technology 3, technology 4
east afrique » east africa, east african, en afrique
cost models » cost model, logit models
case 5.4 » case 5.2, case 5.3, case 1.4
b case » tb case, 2 case, 1 case

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

• Adding a wildcard symbol may retrieve word variants: technology a information b case 5.4 communication cost models development east afrique.*.