その主張を裏付ける証拠は見つからなかったよ

その: the, that, its, those
主張: claim, opinion, assertion, request, emphasis, contention, advocacy, insistence, tenet
を: o, the, to, wo
裏付ける: support, confirm, corroborate, prove, substantiate, to support, to back up, to corroborate, to verify, endorse
証拠: evidence, proof, testimony, demonstration, confirmation, credentials, certification, affidavit
は: a, the, is, am, are, will
見つかる: found, be found, to be found, you'll find
ない: no, not, don't, without, missing, absent
た: the, was, ta, da, other
よ: the, yo, ll