Perhaps you should try some spelling variations:
communication 2.3.3 » communication 3.3, communication 2.4, communication 3.2
face communication » voice communication, de communication, time communication
technologies de » technologies _, technologies 4, technologies 2
developing east » development east, developing a, developing asia
de information » die information, de informacion, e information
4 developing » 3 developing
east africa » west africa
about 2.5 » about 2.15, about 2.3, about 1.3
2.5 face » 2.5 false, 15 face, 2.5 case
2.3.3 4 » 2.3.3 _, 2.3.3 a, 2.3.3 ai

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

• Adding a wildcard symbol may retrieve word variants: technologies de information about 2.5 face communication 2.3.3 4 developing east africa.*.