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    <p>According to rubular, it looks like <code>\w</code> matches all ascii letters and numbers (and underscored), but <code>\b</code> is working well for all Unicode letters. That is a little confusing. </p> <p>What you want, however, are all sequences of ASCII words. This should match them:</p> <pre><code>/\b[a-z]+\b(?:\s+[a-z]+)*\b/i </code></pre> <p>Working example: <a href="http://www.rubular.com/r/1iewl7MpJe" rel="nofollow noreferrer">http://www.rubular.com/r/1iewl7MpJe</a></p> <p>A quick explanation: </p> <ul> <li><code>\b[a-z]+\b</code> - first ASCII word.</li> <li><code>(?:\s+[a-z]+)</code> - any number of spaces and words - at least one space and one letter each time.</li> <li><code>\b</code> - to assure the last word doesn't end in the middle of another word, like <code>n</code> in <code>"con Sharp này"</code>.</li> </ul> <p>I'm not sure about getting an hash, but you can get all <a href="http://ruby-doc.org/core-1.9.3/MatchData.html" rel="nofollow noreferrer"><code>MatchData</code></a>s, similar to:<br> <a href="https://stackoverflow.com/questions/6804557/how-do-i-get-the-match-data-for-all-occurrences-of-a-ruby-regular-expression-in">How do I get the match data for all occurrences of a Ruby regular expression in a string?</a></p> <pre><code>s = "hello !@# world how a9e you" r = /\b[a-z]+\b(?:\s+[a-z]+)*\b/i matches = s.to_enum(:scan, r).map { Regexp.last_match } .map {|match| [match.to_s(), match.begin(0)]} puts matches </code></pre> <p>Here's an example on ideone: <a href="http://ideone.com/YRZE5" rel="nofollow noreferrer">http://ideone.com/YRZE5</a></p>
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    1. COLooks like `\b\w+\b(?:\s+\w+)*\b` would work as well. I'm not sure why I thought \w does match all Unicode letters... Anyway, I'll be checking some documentations. I can't really find it in http://www.ruby-doc.org/core-1.9.3/Regexp.html
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    2. COThat's great! Thank you so much. By the way, how can I get result array as described above using Ruby? I tried **scan** and **match** but did not know how to deal with them?
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    3. CO@ThiemNguyen - Thanks! I've added an example for getting the data you need. I don't really know Ruby aside from answering Stack Overflow questions, so you can probably do better then me `:P`
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