Perhaps you should try some spelling variations:
13.3.9 communication » 13.3.10 communication, 13.4.5 communication, 3.3.2 communication
developpement en » developpement et, developpement des, developpement de
prozess 13.3.9 » process 13.3.1, prozess 1.3, prozess 2.3.4
inflation und » inflation index, inflation _, inflation tax
technology 2 » technology _, technology 1, technology 3
2 inflation » 12 inflation, _ inflation, 6 inflation
und prozess » und prozesse

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

• Adding a wildcard symbol may retrieve word variants: technology 2 inflation und prozess 13.3.9 communication costs _ developpement en afrique.*.