Perhaps you should try some spelling variations:
developpement en » developpement et, developpement des, developpement de
technologie und » technologies 2.1
variation using » variations during, variation und, variation among
und variation » und variationen, 2 variation, 4 variation
das business » sas business, gas business, des business
using das » using dbs, using dcs, using data

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

• If you are trying to use Boolean operators, they must be ALL CAPS: technologie und variation using das business community ((a l) OR (a la)) developpement en afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologie und variation using das business community ((a l) or (a la)) developpement en afrique.*.