Perhaps you should try some spelling variations:
5.4 communication » de communication, data communication
model development » local development, social development, global development
technologie der » technologie de, technologien des, technologies de
infection rate » infection rates, inflation rate
der infection » des infections, der inflation, new infections
rate source » date source, water source, waste source
costs model » cost model, cost models, costs money
source 5.4 » sources 5.4, source 15.4, source 2.4
1 afrique » l afrique, en afrique, 1 enrique

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

• Adding a wildcard symbol may retrieve word variants: technologie der infection rate source 5.4 communication costs model development 1 afrique.*.