Perhaps you should try some spelling variations:
communication event » communication events, communication present, communicative events
clean development » human development, urban development
31 communication » 3.1 communication, 3 communication, 1 communication
development case » development china
information 1.2 » information 1.5.2, information 2
technologies a » technologies _, technologies 4, technologies 2
a information » 2 information, 1 information
case africa » cases africa, care africa, curse africa
1.2 do » 17.2 do, 5.2 do, 1.2 de
do 31 » do 3.1, do 3, do 11

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies a information 1.2 do 31 communication event clean development case africa.~.
• Adding a wildcard symbol may retrieve word variants: technologies a information 1.2 do 31 communication event clean development case africa.*.