Perhaps you should try some spelling variations:
communications series » communication series, communications services, communication services
deux developpement » deux developpements, de developpement, du developpement
developpement de » developpement des, developpement durable
die variation » de variation, does variation, der variation
typology die » typology _, typology 4.1, typology 6
series deux » series de, series index
costs data » cost data

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

• Adding a wildcard symbol may retrieve word variants: typology die variation _ costs data communications series deux developpement de l'afrique.*.