Perhaps you should try some spelling variations:
digital transmission » digital transition, signal transmission, regional transmission
information sources » information resources, information services, information security
social information » social innovation, social transformation, digital information
palm digital » farm digital, from digital, bim digital
deal social » real social, deadly social, legal social
lines » line

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( deal social information sources ) OR ( palm digital transmission lines ))~.
• Adding a wildcard symbol may retrieve word variants: (( deal social information sources ) or ( palm digital transmission lines ))*.