Perhaps you should try some spelling variations:
leur development » leur developpement, your development, spur development
communication 5 » communication _, communication a, communication 3
typologien der » typologie der, typologie des, apologien der
development en » developpement en, development menu, development eco
der variation » de variation, does variation, die variation
variation 6 » variation _, variations _, variation des
5 leur » a leur
co 3 » co a3, c 3, ch 3

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: "typologien der variation 6 ((co 3) OR (hco 3)) communication 5 leur development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologien der variation 6 ((co 3) OR (hco 3)) communication 5 leur development en afrique.*.