Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
ngos communication » ngo communication, nets communication, laos communications
typologies 17.2.1 » typologies 16.4.1, typologies 3.2.1, typologies 7.4.1
17.2.1 validation » 17.2.2 validation, 17.2.3 validation, 17.2.4 validation
validation data » validation des, validation stage
developpement l » developpement il, developpement la, developpement de
l afrique » en afrique
data der » data den, data under, data does
der ngos » der logos

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

• Adding a wildcard symbol may retrieve word variants: typologies 17.2.1 validation data der ngos communication a leur developpement l afrique.*.