Perhaps you should try some spelling variations:
data communication » data communications
de variation » der variation, die variation, does variation
variation 6 » variation _, variations _, variation des
des afrique » en afrique, de l'afrique
policy de » policy del, policy does, policy dale
der data » under data, order data, der daten
6 der » _ der, 2 der, 3 der
2 de » 2 die, 2 der
_ de » _ der, _ den, _ do

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "policy de variation 6 der data communication ((2 de) OR (_ de)) developpement des afrique.~".
• Adding a wildcard symbol may retrieve word variants: policy de variation 6 der data communication ((2 de) OR (_ de)) developpement des afrique.*.