Perhaps you should try some spelling variations:
2.1 transformation » 2.1 transformations, 2.2 transformation, 2.3 transformation
transformation a » transformation _
developpement en » developpement et, developpement des, developpement de
d developpement » de developpement, du developpement, le developpement
technology 2.1 » technology 2.2, technology 3.1, technology 1
die risk » diet risk, de risk, die risiko
a die » 2 die, 3 die, _ die

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

• Adding a wildcard symbol may retrieve word variants: technology 2.1 transformation a die risk communication a d developpement en afrique.*.