Search questions

[pierre]

Hello,

my post was a little long, so here again (details below):

Is there any file or table or field where I can put special characters to make them "searchable" in indexed words?

Is there any way to find special characters like these: _, $, @, #, |, [, ], {, } in indexed words? At this time, I find indexed words with these characters: £, ¦, °, §, ¬, ¢, €, but not with the first group of special characters.

As said in the details below, I tried a lot of things, but without success.