Perhaps you should try some spelling variations:
based representation » based presentation, self representation, data representation
representation early » representation part, representation theory, representation equity
early studies » earlier studies, early stages
code earth » code search, one earth
one heart » one health, one year, one part

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