Perhaps you should try some spelling variations:
runoff irrigation » runoff mitigation, under irrigation, minor irrigation
age developpement » de developpement, le developpement, au developpement
typologie runoff » typologie und, typologie auf, typologie unter
developpement en » developpement et, developpement des, developpement de
media age » media usage, media a, media art
les risk » lens risk, less risky, rules risk

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

• Adding a wildcard symbol may retrieve word variants: typologie runoff irrigation _ les risk communication media age developpement en afrique.*.