Perhaps you should try some spelling variations:
improv\ » improve\ (Expand Search), improved\ (Expand Search)
improvedd\ » improveedd\ (Expand Search), improvededd\ (Expand Search), improved\ (Expand Search), improve\ (Expand Search)
improveee\ » improveeee\ (Expand Search), improvedeee\ (Expand Search), improve\ (Expand Search), improved\ (Expand Search)
improveedeede » improveeedeede (Expand Search), improvedeedeede (Expand Search)
improvedd » improveedd (Expand Search), improvededd (Expand Search), improved (Expand Search), improve (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 improvedd\) OR (improveee\ OR improveedeede ))) OR (\ theatre improvedd ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\ theatre ((improv\ OR improvedd\) OR (improveee\ OR improveedeede ))) OR (\ theatre improvedd ))".
• Adding a wildcard symbol may retrieve word variants: ((\ theatre ((improv\ OR improvedd\) OR (improveee\ OR improveedeede ))) OR (\ theatre improvedd ))*.