Perhaps you should try some spelling variations:
communication costly » communication costs, communication costa, communications costs
development plans » development planning, development policy, development policies
et communication » et communicatione, get communication, debt communication
technology 6.3 » technology 2.3, technology 3.3, technology 1.3
creation rates » taxation rates, graduation rates, protection rates
6.3 creation » 16.3 creation, 4.3 creation, 5.3 creation
costly world » post world, lost world
plans africa » plan africa, loans africa, towns africa
rates rare » rates rates, rates raise, rates have
rare et » faire et, cadre et, carre et

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

• Adding a wildcard symbol may retrieve word variants: technology 6.3 creation rates rare et communication costly world development plans africa.*.