Perhaps you should try some spelling variations:
6.13 communication » 6.1.3 communication, 2.3 communication, 4.1 communication
developpement il » developpement de, developpement et, developpement du
inflation rates » inflation rate
technologien i » technologien im, technologien _, technologien 1
i inflation » iv inflation, _ inflation, 2 inflation
rates case » rates cape, states case, rates east
il afrique » l afrique, en afrique
case 6.13 » case 6.3, case 6.1, case 6.12

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

• Adding a wildcard symbol may retrieve word variants: technologien i inflation rates case 6.13 communication costs _ developpement il afrique.*.