Perhaps you should try some spelling variations:
oral communication » personal communication
clean development » human development, urban development
information flow » information flows
bank afrique » en afrique, bank africa, bank african
costs clean » costs clear
flow 4 » flow _, flow 1, flow 3
4 oral » _ oral, 2 oral

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies _ information flow 4 oral communication costs clean development bank afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies _ information flow 4 oral communication costs clean development bank afrique.*.