Perhaps you should try some spelling variations:
communication paper » communication power, communication pattern, communication partner
1.1 communication » 4.1 communication, 1.3 communication, 1.4 communication
developpement en » developpement et, developpement des, developpement de
inflation debt » inflation der, inflation seit, inflation pt
technology 6 » technology _, technology 1, technology 3
6 inflation » _ inflation, 2 inflation, d inflation
crisis 1.1 » crisis 2.1, crisis 1.2, crisis 3.1

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

• Adding a wildcard symbol may retrieve word variants: technology 6 inflation debt crisis 1.1 communication paper _ developpement en afrique.*.