Perhaps you should try some spelling variations:
2.2.3 communication » 12.2.4 communication, 3.2 communication, 2.7 communication
clean development » human development, urban development
development lid » development led, development li, development lie
technology 1 » technology _
reduce 2.2.3 » reduce pm2.5
1 inflation » 10 inflation, 12 inflation, _ inflation
rate reduce » rates reduce, trade reduce, gates reduce
costs clean » costs clear
lid afrique » l afrique

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

• Adding a wildcard symbol may retrieve word variants: technology 1 inflation rate reduce 2.2.3 communication costs clean development lid afrique.*.