BAPI for Knvv text

Hi all,

I'd be greatful if anyone of you could guide me for the bapi, Is there is any bapi for knvv table text. In KNVV table we have four fields (VKBUR, VKGRP, KVGR1, KVGR2) and the related text we can get in table TVKBT TVGRT TVV1T TVV2T. plz tell me if there is any bapi where we just put these four fields and we can get related text ..

Thnks for ur help

Puneet