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)
improvedee\ » improveedee\ (Expand Search), improvededee\ (Expand Search), improvede\ (Expand Search), improvee\ (Expand Search), improved\ (Expand Search)
improveede » improveeede (Expand Search), improvedeede (Expand Search), improved (Expand Search)
improveedd » improveeedd (Expand Search), improvedeedd (Expand Search), improved (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((\ theatre ((improv\ OR improvede\) OR (improvedee\ OR improveede ))) OR (\ theatre improveedd ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\ theatre ((improv\ OR improvede\) OR (improvedee\ OR improveede ))) OR (\ theatre improveedd ))".
• Adding a wildcard symbol may retrieve word variants: ((\ theatre ((improv\ OR improvede\) OR (improvedee\ OR improveede ))) OR (\ theatre improveedd ))*.