Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
open development » clean development, driven development, human development
development rate » development create, development route, development water
technologies 4 » technologies _
information 10 » information 1, information 11, information 14
4 information » 2 information, 1 information
rate african » ratha african, rates africa, name african
death risk » health risk, heat risk, health risks
cost open » post open
10 death » 19 death, 1 death, 10.4 death

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 information 10 death risk communication cost open development rate african.*.