Perhaps you should try some spelling variations:
representation germany » representation learning, representation series
based representation » based presentation, self representation, data representation
germany studies » german studies, germany studied, germany series
modern north » modern sports, modern 20th, modern 19th

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

• Performing a fuzzy search may retrieve terms with similar spellings: commercial ((code north) or (modern north)) based representation germany studies.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: commercial ((code north) OR (modern north)) based representation germany studies..
• Adding a wildcard symbol may retrieve word variants: commercial ((code north) or (modern north)) based representation germany studies.*.