Perhaps you should try some spelling variations:
"William Shakespeare's collaboratorers" » "William Shakespeare's collaboratore", "William Shakespeare's collaborators", "William Shakespeare's colaboradores", "William Shakespeare's collaboraterers", "William Shakespeare's collaborationrers", "William Shakespeare's collaboratorerers"
"William Shakespeare's collaborato" » "William Shakespeare's collaborate", "William Shakespeare's collaboration", "William Shakespeare's collaboratore"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("William Shakespeare's collaboratorers") OR ("William Shakespeare's collaborato"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"William Shakespeare's collaboratorers\") OR (\"William Shakespeare's collaborato\"))".
• Removing quotes may allow a broader search: (( William Shakespeare's collaboratorers ) OR ( William Shakespeare's collaborato )).
• Adding a wildcard symbol may retrieve word variants: (("William Shakespeare's collaboratorers") OR ("William Shakespeare's collaborato"))*.