Perhaps you should try some spelling variations:
communication costly » communication costs, communication costa, communications costs
development canada » development china, development case, development center
per communication » power communication, peru communications, de communication
technology 6.3.4 » technology 6.3.1, technology 3.3.4, technology 6.2.4
land development » world development, child development
6.3.4 creation » 6.2.4 creation, 6.3.4.2 creation, 6.3.4 creating
canada africa » can africa, sahara africa, canada april
costly land » cost land, costs land, country land
rates per » rates der, states per, rates fur

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

• Adding a wildcard symbol may retrieve word variants: technology 6.3.4 creation _ rates per communication costly land development canada africa.*.