Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
3.2 communication » 3 communication, 2.3 communication, de communication
urban development » human development
population area » population age, population africa, population share
development li » development lid, development lie, development lin
technology de » technology does, technology dlt, technology 1
de population » do population, deer population, does population
area sites » para sites, area systems
cost urban » most urban, worst urban, bust urban
li afrique » l afrique, en afrique
sites 3.2 » states 3.2

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

• Adding a wildcard symbol may retrieve word variants: technology de population area sites 3.2 communication cost urban development li afrique.*.