Perhaps you should try some spelling variations:
based presentation » based representation, case presentation, brief presentation
presentation care » presentation large, presentation ease, presentation award
across fourier » across countries
across sources » across countries
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 fourier) OR (across sources)) based presentation care studies.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "commercial ((across fourier) OR (across sources)) based presentation care studies.".
• Adding a wildcard symbol may retrieve word variants: commercial ((across fourier) OR (across sources)) based presentation care studies.*.