However, the exact phrasing "Searching for Earth Abides in" is not a standard title of a known published paper. You may be thinking of a paper that investigates themes from Earth Abides within another work or genre.
David M. Robinson Published in: Science Fiction Studies , Vol. 32, No. 3 (November 2005), pp. 432–447 Searching for- Earth Abides in-
Here is the closest known scholarly paper that directly engages with Earth Abides in a searching/analytic sense: “The Pastoral Aftermath: Searching for Community in George R. Stewart’s Earth Abides” However, the exact phrasing "Searching for Earth Abides