I have three scopes: scope A with rule include http: //mywebapp/lists/myList scope B with rule include FileExtenion aspx scope C with rule include http: //mywebapp/mysitecollection2/ some managed properties mapped to columns from myList, ows_contenttype, ows_created (Property1,2,3) select title, url, description, Property1, Property2, Property3 from Scope() where scope = 'A' this returns 15 resullts select title, url, description, Property1, Property2, Property3 from Scope() where scope = 'B' this returns 50 results select title, url, description, Property1, Property2, Property3 from Scope() where scope = 'C' this returns 10 results so why this query select title, url, description, Property1, Property2, Property3 from Scope() where scope = 'A' or scope='B' or scope='C' doesnt return 75 results ?? it returns 15 or some FullTextSqlQuery sqlQuery = new FullTextSqlQuery (site); sqlQuery .ResultTypes = ResultType .RelevantResults ; sqlQuery .QueryText = sql ; sqlQuery .TrimDuplicates = true; sqlQuery.EnableStemming=true; ResultTableCollection results = sqlQuery .Execute();