Perhaps you should try some spelling variations:
communications series » communication series, communications services, communication services
le developpement » de developpement, sme development
variation using » variations during, variation und, variation among
developpement l » developpement il, developpement la, developpement de
de variation » der variation, die variation, does variation
typology de » typology _, typology 6, typology a
using does » using deep, being does, using aes
does data » does cat
series le » series e, series de, series ltre
l afrique » en afrique

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

• Adding a wildcard symbol may retrieve word variants: typology de variation using does data communications series le developpement l afrique.*.