Perhaps you should try some spelling variations:
improv\ » improve\ (Expand Search), improved\ (Expand Search)
improveedd » improveeedd (Expand Search), improvedeedd (Expand Search), improved (Expand Search), improvedd (Expand Search)
improveeed » improveeeed (Expand Search), improvedeeed (Expand Search), improved (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)

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