Perhaps you should try some spelling variations:
communication class » communication cross, communication case, communication crisis
3.1 communication » 3.1 communications, 3.2 communication, 3.5 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
tax case » tax cases, tax base, tax bases
case 3.1 » case 4.1, case 3.2, case 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 case 3.1 communication class resource development 1 afrique.*.