Can someone tell me why this query

select vet.ID, svp.ID_PACIENTE, vet.conselho, vet.uf, vet.numConselho, vet.nome, svp.SEQ_SOLICITANTE, vet.numConselho , vlab.numConselho
from RPE.Veterinario vet
inner join RPE.VeterinarioLab vlab
    ON vet.conselho = vlab.conselho
    AND vet.numConselho = vlab.numConselho
    AND vet.uf = vlab.uf
left join MySevi.SolicitanteVeterinarioPaciente svp
    on svp.ID_VETERINARIO = vet.ID
where svp.ID_PACIENTE in ('6408||284144||47633', '6408||284145||47634')

does't return any value and this query