Perhaps you should try some spelling variations:
optic communication » optical communications, public communication, device communication
technologies using » technologies during, technologies going, technologies listing
using information » business information, managing information
information say » information s1, information space, information staat
ann development » can development, un development, asian development
systems ann » systems andy, systems a, systems all
4.3 optic » 4.3 optical
say 4.3 » say 3.3, say 4.2, say 5.3

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

• Adding a wildcard symbol may retrieve word variants: technologies using information say 4.3 optic communication systems ann development 1 africa.*.