Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication model » communication media
time integrating » ims integrating, true integrating, city integrating
au developpement » du developpement, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
technology time » technology tpm, technology crimes, technology trade
integrating a » integrating _, integrating human
3.3 optical » 3.3 optimal, 3.3 political, 3.3 critical
model au » modele au, model a, model aa
a 3.3 » a 3.2, i 3.3

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

• Adding a wildcard symbol may retrieve word variants: technology time integrating a 3.3 optical communication model au developpement en afrique.*.