Perhaps you should try some spelling variations:
based representation » based presentation, self representation, la representation
data representation » data presentation, legal representation, self representation
commercial across » commercial crops, commercial actors, commercial crisis
across fourier » across sources, across countries
scale studies » case studies

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 fourier ((based representation) OR (data representation)) scale studies.~".
• Adding a wildcard symbol may retrieve word variants: commercial across fourier ((based representation) OR (data representation)) scale studies.*.