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
process 13.3.9 » process 13.3.1, process 3.3.1, process 1.3.1
inflation und » inflation index, inflation _, inflation tax
technology 1 » technology _
1 inflation » 10 inflation, 12 inflation, _ inflation
und process » und prozess, undue process, und prozesse

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

• Adding a wildcard symbol may retrieve word variants: technology 1 inflation und process 13.3.9 communication costs _ developpement en afrique.*.