Perhaps you should try some spelling variations:
sectoral combustion » sectoral composition, coal combustion, straw combustion
der developpements » des developpements, deux developpements, de developpement
combustion system » combustion systems, compensation system, collection system
developpements la » developpement la, developpements de, developpement de
ids information » aids information, dis information, mis information
technology ids » technology isst, technology ict, technology ii
four sectoral » four sectors, finer sectoral, from sectoral
fabrique. » afrique., fabrice.

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

• Adding a wildcard symbol may retrieve word variants: technology ids information _ four sectoral combustion system der developpements la fabrique.*.