Perhaps you should try some spelling variations:
based presentation » based representation, case presentation, brief presentation
commercial across » commercial crops, commercial actors, commercial crisis
across fourier » across sources, across countries
across studies » across states, across sources, across species
fourier based » course based, order based
cases studies » case studies, based studies, cost studies

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

• If you are trying to use Boolean operators, they must be ALL CAPS: commercial across fourier based presentation ((cases studies) OR (across studies)).~.
• Adding a wildcard symbol may retrieve word variants: commercial across fourier based presentation ((cases studies) or (across studies)).*.