Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
5.4 communications » 5.4 communication, 1.4 communication, 14 communications
models development » model development, module development, model developments
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
costs models » cost models, cost model, potts models
east afrique » east africa, east african, en afrique
false 5.4 » case 5.4
b false » _ false, a false, 2 false

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 false 5.4 communications costs models development east afrique.*.