Perhaps you should try some spelling variations:
3.3 communication » 2.3 communication, 3.2 communication, 3.5 communication
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
rate leser » rate level, rate beer
de afrique » de l'afrique, en afrique, l afrique
leser 3.3 » leser 3.1, leser 3.2, leser 3.4
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technologien _ inflation rate leser 3.3 communication costs a developpement de afrique.*.