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)
improveede » improveeede (Expand Search), improvedeede (Expand Search), improved (Expand Search)
improveee » improveeee (Expand Search), improvedeee (Expand Search), improve (Expand Search), improved (Expand Search)
improveeedede » improveeeedede (Expand Search), improvedeeedede (Expand Search), improvedede (Expand Search), improveddede (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 improveede) ) OR improveee )) OR (\ theatre improveeedede ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\ theatre ((improv\ OR (improvede OR improveede) ) OR improveee )) OR (\ theatre improveeedede ))".
• Adding a wildcard symbol may retrieve word variants: ((\ theatre ((improv\ OR (improvede OR improveede) ) OR improveee )) OR (\ theatre improveeedede ))*.