Perhaps you should try some spelling variations:
improv\ » improve\ (Expand Search), improved\ (Expand Search)
improvee\ » improveee\ (Expand Search), improvedee\ (Expand Search), improve\ (Expand Search), improved\ (Expand Search)
improveee\ » improveeee\ (Expand Search), improvedeee\ (Expand Search), improvee\ (Expand Search), improvede\ (Expand Search), improve\ (Expand Search), improved\ (Expand Search)
improveedde » improveeedde (Expand Search), improvedeedde (Expand Search), improvedde (Expand Search), improveddde (Expand Search)
improvedeed » improveedeed (Expand Search), improvededeed (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 (\ theatre (((improvee\ OR improveee\) OR improveedde ) OR improvedeed )))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\ theatre improv\ ) OR (\ theatre (((improvee\ OR improveee\) OR improveedde ) OR improvedeed )))".
• Adding a wildcard symbol may retrieve word variants: ((\ theatre improv\ ) OR (\ theatre (((improvee\ OR improveee\) OR improveedde ) OR improvedeed )))*.