Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication model » communication media
law developpement » le developpement, au developpement, leur developpement
time integrating » ims integrating, true integrating, city integrating
developpement en » developpement et, developpement des, developpement de
technology time » technology tpm, technology crimes, technology trade
integrating a » integrating _, integrating human
3.2 optical » 3.2 optimal, 3.3 optical, 8.2 optical
a 3.2 » _ 3.2, a 4.2

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 3.2 optical communication model law developpement en afrique.*.