Search based on words of a phrase, just like SO related questions

I'm trying to get search results just like the stack overflow Related question开发者_运维技巧s, when you ask a new question.

How can I do with lucene, a search which would match all words or at least one or two words in my phrase ?

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There's a Lucene contribution called MoreLikeThis that does what you're looking for. Here's an article on using it: Using Lucene and MoreLikeThis to show related content.