Search special characters

Hello!
I am trying to search special characters in a field where values might be like
BOSCH (+8) some other article
BOSCH (+16) some article
DENSO (+1) ik20
and so on.
so i need to have possibility to search like +8 and find appropriate items.
would be grateful for any help!

Welcome!

If you are using a keyword data type for the field and a term query, that would work.

no, i have it as a text field where i combined several fields from db to implement full_text search. is there any solution to do such search on a text field?

It will depend on the analyzer. You need to find the right analyzer (probably a custom one) that fits your needs.
But why not using a keyword type if you are after exact matches?

it's an autoparts shop and full_text field can be something like "Denso spark plug ik20 subaru legacy"
and user would search like "subaru spark", "denso subaru" or "ik2", "ik20" so it would be possible to find matching product on different search conditions

So I think this is working out of the box... Just ik2 won't match out of the box but this is something you can solved in different ways with edge n grams or synonyms.

thak u so much sir, for your response! i'll give it another try to figure out how to do it best.