Hi Emir, Listed below are the debugQuery outputs from query without "OR" operator. I really appreciate your help! --Wendy
===============DebugQuery Outputs for case 1f-a, 1f-b without "OR" operator================= *1f-a (/search?q=+method:"x-ray*" +method:"Solution NMR") result counts = 0: * "debug":{ "rawquerystring":" method:\"x-ray*\" method:\"Solution NMR\"", "querystring":" method:\"x-ray*\" method:\"Solution NMR\"", "parsedquery":"(+(PhraseQuery(method:\"x rai\") PhraseQuery(method:\"solut nmr\"))~2)/no_coord", "parsedquery_toString":"+((method:\"x rai\" method:\"solut nmr\")~2)", *1f-b (/search?q=method:"x-ray*" method:"Solution NMR") result counts = 0: * "debug":{ "rawquerystring":"method:\"x-ray*\" method:\"Solution NMR\"", "querystring":"method:\"x-ray*\" method:\"Solution NMR\"", "parsedquery":"(+(PhraseQuery(method:\"x rai\") PhraseQuery(method:\"solut nmr\"))~2)/no_coord", "parsedquery_toString":"+((method:\"x rai\" method:\"solut nmr\")~2)", -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html