Perhaps you should try some spelling variations:
collaborative series » collaborative services, collaborative studies, collaborative agencies
collaborative social » collaborative goal, collaborative capital, collaborative cell
greenland digital » greening digital, sweetland digital
digital rhetoric » digital record, digital theorien, visual rhetoric

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

• Performing a fuzzy search may retrieve terms with similar spellings: greenland digital rhetoric ((collaborative series) or (collaborative social))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: greenland digital rhetoric ((collaborative series) OR (collaborative social)).
• Adding a wildcard symbol may retrieve word variants: greenland digital rhetoric ((collaborative series) or (collaborative social))*.