Exact string search

Question

i was wondering if there was a way to do an exact string search in a document.
If i have a document that has punctuation i want to be able to find the document only if i query whith an exact string match, including stopwords and punctuations.
if the query is
select *
from documents1
where contains(OBJECT_VALUE,'{hello, world}') > 0
I want only to return the documents that have exactly "hello, world" whith the comma included.
If i add the comma to printjoins, it would work, But when i query for only "hello" it wont match "hello, world"
basicaly im looking for something that does a normal search but then check if the exact string is in the match area.

Answer 1

Try this
select substr(&P, (INSTR(&P, CHR('32'), 1))+1, (INSTR(&P, CHR('32'), 1)))
from dual
&p is a variable
I am sure this will help you in any of case
chr(32) will return space, If you have any other thing except space then you just replace 32 with that ascii code. Such as for
1(we)2 then query will be
select substr(&P, (INSTR(&P, CHR('40'), 1))+1, (INSTR(&P, CHR('41'), 1)))
from dual
Try it and tell is it working fine