Perhaps you should try some spelling variations:
improv\ » improve\ (Expand Search), improved\ (Expand Search)
improveddd\ » improveeddd\ (Expand Search), improvededdd\ (Expand Search), improved\ (Expand Search)
improvedeee\ » improveedeee\ (Expand Search), improvededeee\ (Expand Search)
improveee » improveeee (Expand Search), improvedeee (Expand Search), improve (Expand Search), improved (Expand Search)
improveeed » improveeeed (Expand Search), improvedeeed (Expand Search), improved (Expand Search), improvedd (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 improveddd\) OR (improvedeee\ OR improveee ))) OR (\ theatre improveeed ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\ theatre ((improv\ OR improveddd\) OR (improvedeee\ OR improveee ))) OR (\ theatre improveeed ))".
• Adding a wildcard symbol may retrieve word variants: ((\ theatre ((improv\ OR improveddd\) OR (improvedeee\ OR improveee ))) OR (\ theatre improveeed ))*.