Perhaps you should try some spelling variations:
communications 2 » communications _, communications a, communications 5
dams development » dam development, gas development, ads development
development ds » development d, development does, development desd
typologies et » typologie et, typologies art, typologies _
variation der » variation des, variation bei, variation _
et variation » der variation, bei variation, 2 variation
ds afrique » en afrique, l afrique, de l'afrique
em data » them data, aim data, dpm data
nm data » aim data, dpm data, gbm data
2 dams » 2 das, _ dams, 6 dams

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 et variation der ((em data) OR (nm data)) communications 2 dams development ds afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologies et variation der ((em data) OR (nm data)) communications 2 dams development ds afrique.*.