Perhaps you should try some spelling variations:
communication costa » communication costs, communications costs, communication cote
models development » model development, module development, model developments
5.4 communication » de communication, data communication
a information » 2 information, 1 information
information b » information 2, information 1, information bank
development l » development li, development 1, development law
technology a » technology 1, technology 3, technology 4
costa models » cost models, cost model, copula models
l afrique » en afrique
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 costa models development l afrique.*.