Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement en » developpement et, developpement des, developpement de
3 developpement » de developpement, le developpement, et developpement
des variation » does variation, de variation, der variation
2.1 personal » 3.1 personal, 2.3 personal, 2.4 personal
theorie des » theorie der
variation 2 » variation 27, variation _, variation 6
2 2.1 » b 2.1, _ 2.1, a 2.1

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

• Adding a wildcard symbol may retrieve word variants: theorie des variation 2 2.1 personal communication a 3 developpement en afrique.*.