Perhaps you should try some spelling variations:
improv » improve (Expand Search), improved (Expand Search)
improveed » improveeed (Expand Search), improvedeed (Expand Search), improved (Expand Search), improve (Expand Search)
improvede\ » improveede\ (Expand Search), improvedede\ (Expand Search), improved\ (Expand Search), improve\ (Expand Search)
improveed\ » improveeed\ (Expand Search), improvedeed\ (Expand Search), improved\ (Expand Search), improve\ (Expand Search)
improvedededed » improveedededed (Expand Search), improvededededed (Expand Search), improveddeded (Expand Search), improvededed (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 improveed )) OR (\ theatre ((improvede\ OR improveed\) OR improvedededed )))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\ theatre (improv OR improveed )) OR (\ theatre ((improvede\ OR improveed\) OR improvedededed )))".
• Adding a wildcard symbol may retrieve word variants: ((\ theatre (improv OR improveed )) OR (\ theatre ((improvede\ OR improveed\) OR improvedededed )))*.