Perhaps you should try some spelling variations:
communications series » communication series, communications services, communication services
new developpements » new developments, des developpements, et developpements
developpements de » developpement de, developpement des, developpement du
how variation » how valuation, does variation, four variation
typology how » typology from, typology _, typology 4.1
costs data » cost data
series new » services new, series e, series index

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

• Adding a wildcard symbol may retrieve word variants: typology how variation _ costs data communications series new developpements de l'afrique.*.