Perhaps you should try some spelling variations:
communications 1 » communications 14, communications _, communications a
development does » development data, development 1, development 1.1
das development » dams development, gas development, does development
does afrique » en afrique, does africa
bei em » bei dem, bei ex

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: "typologies _ variation ((bei em) OR (bei bm)) data communications 1 das development does afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologies _ variation ((bei em) OR (bei bm)) data communications 1 das development does afrique.*.