Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
developpement en » developpement et, developpement des, developpement de
innovation base » innovation based, innovation case, innovations case
technologies 4 » technologies _
4 innovation » 2 innovation, 3 innovation, der innovation
base 3.1 » bases 3.1, basel 3.1, case 3.1
3.1 de » 3.1 die, 3.1 der, 3.1 def
a du » a d, a u, _ du
a de » a die, a der, a des

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies 4 innovation base 3.1 de communication ((a du) OR (a de)) developpement en afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "technologies 4 innovation base 3.1 de communication ((a du) OR (a de)) developpement en afrique.*".