Perhaps you should try some spelling variations:
based representation » based presentation, data representation, la representation
self representation » self presentation, legal representation
commercial across » commercial crops, commercial actors, commercial crisis
across order » across older, across borders, across gender
care studies » case studies, career studies, scale studies

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

• Performing a fuzzy search may retrieve terms with similar spellings: commercial across order ((based representation) OR (self representation)) care studies.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "commercial across order ((based representation) OR (self representation)) care studies.".
• Adding a wildcard symbol may retrieve word variants: commercial across order ((based representation) OR (self representation)) care studies.*.