Perhaps you should try some spelling variations:
improv\" » improve\" (Expand Search), improved\" (Expand Search)
improvede\" » improveede\" (Expand Search), improvedede\" (Expand Search), improved\" (Expand Search), improve\" (Expand Search)
improvedeede\" » improveedeede\" (Expand Search), improvededeede\" (Expand Search), improvedede\" (Expand Search), improveede\" (Expand Search)
improvededeede\" » improveededeede\" (Expand Search), improvedededeede\" (Expand Search), improveddeede\" (Expand Search), improvedeede\" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"theatre (improv\\" OR improvede\\")) OR (\\"theatre (improvedeede\\" OR improvededeede\\")))\"".
• Removing quotes may allow a broader search: (( theatre (improv OR improvede )) OR ( theatre (improvedeede OR improvededeede ))).