Perhaps you should try some spelling variations:
technologies effective » technologies affect, technologies perspectives, technologien incentive
effective sanitation » effective adaptation, effective education, effective action
las communication » lea's communication, class communication, laos communications
das developpement » des developpements, de developpement, du developpement
sanitation a » sanitation _, sanitation law, sanitation tax
des afrique » en afrique, de l'afrique
a de » a die, a der, a des

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

• Adding a wildcard symbol may retrieve word variants: technologies effective sanitation a de las communication _ das developpement des afrique.*.