Perhaps you should try some spelling variations:
communications 4 » communications 14, communications _, communications a
dams development » dam development, gas development, ads development
development en » developpement en, development menu, development eco
der variation » de variation, does variation, die variation
apology der » apology mea, apologien der, apologie des
4 dams » 4 das, _ dams, 4 dam

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: "apology der variation ((2 der) OR (_ der)) data communications 4 dams development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: apology der variation ((2 der) OR (_ der)) data communications 4 dams development en afrique.*.