Perhaps you should try some spelling variations:
technologies challenges » technological challenges, technology challenges, techniques challenges
challenges options » challenges operations, challenges solutions, challenges oration
oral communication » personal communication
le developpement » de developpement, sme development
developpement il » developpement de, developpement et, developpement du
options 1.2 » options 2.2, options 3.2, options 4.2
il afrique » l afrique, en afrique
2 oral » _ oral, 4 oral
1.2 2 » 1.2 _, 1.2 a, 1.2 r
a le » a les, a la, a l

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

• Adding a wildcard symbol may retrieve word variants: technologies challenges options 1.2 2 oral communication a le developpement il afrique.*.