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)
improvededeeeed\ » improveededeeeed\ (Expand Search), improvedededeeeed\ (Expand Search), improveddeeeed\ (Expand Search), improvedeeeed\ (Expand Search)
improvededeeeed » improveededeeeed (Expand Search), improvedededeeeed (Expand Search), improveddeeeed (Expand Search), improvedeeeed (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\ theatre (improv\ OR improvede\) ) OR (\ theatre (improvededeeeed\ OR improvededeeeed )))~".
• Adding a wildcard symbol may retrieve word variants: ((\ theatre (improv\ OR improvede\) ) OR (\ theatre (improvededeeeed\ OR improvededeeeed )))*.