Perhaps you should try some spelling variations:
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
developpement de » developpement des, developpement durable
technology open » technology one, technology other, technology o140
4 developpement » de developpement, le developpement, et developpement
innovation das » innovation ddi, innovation die, innovation do
das phase » gas phase, data phase, dual phase
phase 4.1 » phase 4.2, phase 4.3, phase 2.1
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology open innovation das phase 4.1 communication costs 4 developpement de l'afrique.*.