Perhaps you should try some spelling variations:
improv\ » improve\ (Expand Search), improved\ (Expand Search)
improveede\ » improveeede\ (Expand Search), improvedeede\ (Expand Search), improved\ (Expand Search), improvede\ (Expand Search), improvee\ (Expand Search)
improvedde » improveedde (Expand Search), improvededde (Expand Search), improved (Expand Search)
improveed » improveeed (Expand Search), improvedeed (Expand Search), improved (Expand Search), improve (Expand Search)
improveede » improveeede (Expand Search), improvedeede (Expand Search), improved (Expand Search), improvede (Expand Search), improvee (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 improveede\) OR improvedde ) OR improveed )) OR (\ theatre improveede ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\ theatre (((improv\ OR improveede\) OR improvedde ) OR improveed )) OR (\ theatre improveede ))*".