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)
improvededde\" » improveededde\" (Expand Search), improvedededde\" (Expand Search), improveddde\" (Expand Search), improvedde\" (Expand Search)
improvededdd\" » improveededdd\" (Expand Search), improvedededdd\" (Expand Search), improvedddd\" (Expand Search), improveddd\" (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 (\\\"theatre ((improvede\\" OR improvededde\\") OR improvededdd\\")))\\"\"".
• Removing quotes may allow a broader search: ((\ theatre improv\ ) OR (\ theatre ((improvede OR improvededde ) OR improvededdd ))).