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), improvedd\ (Expand Search)
improvee » improveee (Expand Search), improvedee (Expand Search), improve (Expand Search), improved (Expand Search)
improveded » improveeded (Expand Search), improvededed (Expand Search), improved (Expand Search)
improveeeee » improveeeeee (Expand Search), improvedeeeee (Expand Search), improveeee (Expand Search), improvedeee (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 improvee ) OR improveded )) OR (\ theatre improveeeee ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\ theatre (((improv\ OR improveed\) OR improvee ) OR improveded )) OR (\ theatre improveeeee ))".
• Adding a wildcard symbol may retrieve word variants: ((\ theatre (((improv\ OR improveed\) OR improvee ) OR improveded )) OR (\ theatre improveeeee ))*.