Perhaps you should try some spelling variations:
models development » model development, module development, model developments
communication cost » communication costs, communication costa, communications costs
3.2 communication » 3 communication, 2.3 communication, de communication
inflation rates » inflation rate
technology 2 » technology _, technology 1, technology 3
rates spaces » places spaces, papers spaces, spaces spaces
2 inflation » 12 inflation, _ inflation, 6 inflation
cost models » cost model, logit models
spaces 3.2 » space 3.2, spaces 4.2, spaces 6.2

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

• Adding a wildcard symbol may retrieve word variants: technology 2 inflation rates spaces 3.2 communication cost models development 1 africa.*.