Perhaps you should try some spelling variations:
improv\\" » improve\\" (Expand Search), improved\\" (Expand Search)
improvee\" » improveee\" (Expand Search), improvedee\" (Expand Search), improve\" (Expand Search), improved\" (Expand Search)
improveed\" » improveeed\" (Expand Search), improvedeed\" (Expand Search), improved\" (Expand Search), improvedd\" (Expand Search), improve\" (Expand Search)
improveeeeddd\" » improveeeeeddd\" (Expand Search), improvedeeeeddd\" (Expand Search), improveeeddd\" (Expand Search), improvedeeddd\" (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 ((improvee\\" OR improveed\\") OR improveeeeddd\\")))\\"\"".
• Removing quotes may allow a broader search: ((\ theatre improv\ ) OR (\ theatre ((improvee OR improveed ) OR improveeeeddd ))).