Perhaps you should try some spelling variations:
communication class » communication cross, communication case, communication crisis
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
technologie der » technologie de, technologien des, technologies de
class resource » case resource, access resource, crisis resource
der inflation » core inflation, _ inflation, low inflation
inflation tax » inflation rate, inflation _, inflation target
1 afrique » l afrique, en afrique, 1 enrique
code 4.1 » codes 4.1, code 2.1, code 6.1

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

• Adding a wildcard symbol may retrieve word variants: technologie der inflation tax code 4.1 communication class resource development 1 afrique.*.