Thank you for your answers. I have more than 30 criterion to search  and this is only one of them!
I have to use criteria  API. So if you now the right criterion to use, let me know.

I have used this code:

DetachedCriteria criteria = DetachedCriteria.forClass(Document.class);
Criterion tagCriterion = Restrictions.in("tags",new String[] {"TAG1"});
criteria.add( tagCriterion );

this code throws an exception:

could not execute query;
nested exception is org.hibernate.exception.SQLGrammarException: could not execute query
...
No value specified for parameter 1

Any help?