Perhaps you should try some spelling variations:
des developpements » deux developpements, de developpement, et developpements
ngo communication » togo communications, de communication, 3 communication
developpements en » developpement en, developpement et, developpements de
typologies 2.3 » typologies 2.5, typologies 6.3, typologie 1.3
2.3 variation » 3.3 variation, 1.3 variation, 2.1 variation
dem ngo » dem nemo
a des » a der, a das

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

• Adding a wildcard symbol may retrieve word variants: typologies 2.3 variation _ dem ngo communication a des developpements en afrique.*.