Finding DMS documents via classification values

Hi,

I have a list of characteristic values, from which i need to find the DMS documents which use that characteristic, and have those values.

I have used table AUSP, but when i find that characteristic, the value fields are empty, therefore i don't find anything.

Could someone please help by either telling me which tables to check in order to find these values, or if there is a function module which allows you to enter a characteristic value, and find all documents using that value.

Thanks in advance.