如何在Lucene.Net中找到同义词

I need lucene to search for synonyms as well as the actual keyword. that is if I search for "CI", I want it to search for CI OR "continues integration". at the moment I search for keywords I have the synonyms for and replace them with the "OR-ed" version, but I suspect there should be a better way to do this. my method will not work for complex queries where you have something like "x AND y OR NOT z".I need lucene to search for synonyms as well as