Perhaps you should try some spelling variations:
based representation » based presentation, self representation, data representation
representation et » representation des, representation _, representation 3
code earth » code search
et studies » pet studies, eu studies, east studies
one earth » one heart, one part, one birth

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 earth) or (((one earth) or (low birth)))) based representation et studies.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: commercial ((code earth) OR (((one earth) OR (low birth)))) based representation et studies..
• Adding a wildcard symbol may retrieve word variants: commercial ((code earth) or (((one earth) or (low birth)))) based representation et studies.*.