Perhaps you should try some spelling variations:
optics communication » optic communication, optical communication, optical communications
au developpement » du developpement, de developpement, le developpement
developpement de » developpement des, developpement durable
information pt » information part, information 1, information 1.2
systems au » systems auf, systems aus, systems a
11 optics » 1.1 optics, 10 optics, 13 optics
de africa » does africa, de america, use africa
pt 11 » pt 1, pt 10, pt 12

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information pt 11 optics communication systems au developpement de africa.*.