Perhaps you should try some spelling variations:
persona communication » personal communication, personal communications, personal communicator
gamma variables » dummy variables, data variables, same variables
u developpement » du developpement, au developpement, ou developpement
typology gamma » typology alma
variables 4 » variables _, variables 2.3
die persona » die person, de persona, die personale
des afrique » en afrique, de l'afrique
4 die » 2 die, 3 die, _ die
a u » a un, a us

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

• Adding a wildcard symbol may retrieve word variants: typology gamma variables 4 die persona communication a u developpement des afrique.*.