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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "commercial across order ((based presentation) OR (based representation)) scale studies.~".
• Adding a wildcard symbol may retrieve word variants: commercial across order ((based presentation) OR (based representation)) scale studies.*.