Perhaps you should try some spelling variations:
perspectives carol » perspectives cross, perspectives can, perspectives case
commercial crisis » commercial crimes, commercial risks, commercial credits
carol studies » carlo studies, care studies, control studies
plant based » place based
past based » cost based, fact based, sat 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 crisis ((past based) OR (plant based)) perspectives carol studies.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "commercial crisis ((past based) OR (plant based)) perspectives carol studies.".
• Adding a wildcard symbol may retrieve word variants: commercial crisis ((past based) OR (plant based)) perspectives carol studies.*.