Perhaps you should try some spelling variations:
presentation based » presentation ease, representations based, presentation phase
presentation layer » presentation ease, presentation lab, presentation large
commercial actors » commercial crops, commercial sector, commercial farmers
actors one » actors new, actors non, actors roles
one case » some case, one class, one phase

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

• Performing a fuzzy search may retrieve terms with similar spellings: commercial actors one case ((presentation layer) or (presentation based)) studies.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: commercial actors one case ((presentation layer) OR (presentation based)) studies..
• Adding a wildcard symbol may retrieve word variants: commercial actors one case ((presentation layer) or (presentation based)) studies.*.