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)
improveede\" » improveeede\" (Expand Search), improvedeede\" (Expand Search), improvede\" (Expand Search), improvee\" (Expand Search), improved\" (Expand Search), improvedde\" (Expand Search)
improvee\" » improveee\" (Expand Search), improvedee\" (Expand Search), improve\" (Expand Search), improved\" (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 improveed\\")) OR (\\"theatre (improveede\\" OR improvee\\")))~\"".
• Removing quotes may allow a broader search: (( theatre (improv OR improveed )) OR ( theatre (improveede OR improvee )))~.