Perhaps you should try some spelling variations:
communication event » communication events, communication present, communicative events
clean development » human development, urban development
development rates » development rate, development notes, development water
information 15.2 » information 1.5.2, information 1.2, information 1.3
1 communication » 10 communication, 3 communication, 4 communication
technologies 1 » technologies _, technologies 4, technologies 2
rates africa » state africa
15.2 do » 5.2 do, 15.2 die, 15.2 how
do 1 » do 10, do 11, do 13

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies 1 information 15.2 do 1 communication event clean development rates africa.~.
• Adding a wildcard symbol may retrieve word variants: technologies 1 information 15.2 do 1 communication event clean development rates africa.*.