Oracle Contains Query Returning False Positives -

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i trying search names in clob field in oracle using contains. know text testing on contains 'joe smith' 1 space in between joe , smith, query works returns records when run it:

select * case_search contains(text, 'joe smith', 1) > 0

the issue query, 2 spaces between joe , smith, returning text hit text has 'joe smith' 1 space , not 'joe smith' 2 spaces:

select * case_search contains(text, 'joe  smith', 1) > 0

i can add many spaces in between joe , smith , still returns hit. need add name hit in exact form table in order work later. can explain happening here , how fix it?


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