Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
models development » model development, module development, model developments
1.1 communication » 4.1 communication, 1.3 communication, 1.4 communication
technology trap » technology trade, technology tax, technology than
inflation state » inflation starts, inflation rate, simulation state
trap inflation » grade inflation, rapid inflation, great inflation
development en » developpement en, development menu, development eco
cost models » cost model, logit models
space 1.1 » spaces 1.1, space 2.1, space 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology trap inflation state space 1.1 communication cost models development en afrique.*.