Perhaps you should try some spelling variations:
presentation award » presentation av
presentation talk » presentation als, presentation attack, presentation trade
commercial crops » commercial code, commercial credit, commercial banks
crops fourier » group fourier
fourier based » course based, order based

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

• Performing a fuzzy search may retrieve terms with similar spellings: commercial crops fourier based ((presentation talk) OR (presentation award)) studies.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "commercial crops fourier based ((presentation talk) OR (presentation award)) studies.".
• Adding a wildcard symbol may retrieve word variants: commercial crops fourier based ((presentation talk) OR (presentation award)) studies.*.