Perhaps you should try some spelling variations:
clean development » human development, urban development
die communication » de communication, time communication, une communication
planning african » planning africa, explaining african, linking african
technologies a » technologies _, technologies 4, technologies 2
a information » 2 information, 1 information
costs clean » costs clear
3.2 2 » 3.2 _, 3.2 a, 3.2 k

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

• Adding a wildcard symbol may retrieve word variants: technologies a information 3.2 2 die communication costs clean development planning african.*.